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70671071081 = 135436236237
BaseRepresentation
bin100000111010001010…
…0101111011101101001
320202102012002101100002
41001310110233131221
52124213243233311
652244342152345
75051203123052
oct1016424573551
9222365071302
1070671071081
1127a75a82776
12118437226b5
136883498430
1435c5bbd729
151c894bb93b
hex107452f769

70671071081 has 4 divisors (see below), whose sum is σ = 76107307332. Its totient is φ = 65234834832.

The previous prime is 70671071077. The next prime is 70671071137. The reversal of 70671071081 is 18017017607.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12232360000 + 58438711081 = 110600^2 + 241741^2 .

It is a cyclic number.

It is not a de Polignac number, because 70671071081 - 22 = 70671071077 is a prime.

It is a super-2 number, since 2×706710710812 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70671071381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2718118106 + ... + 2718118131.

It is an arithmetic number, because the mean of its divisors is an integer number (19026826833).

Almost surely, 270671071081 is an apocalyptic number.

It is an amenable number.

70671071081 is a deficient number, since it is larger than the sum of its proper divisors (5436236251).

70671071081 is a wasteful number, since it uses less digits than its factorization.

70671071081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5436236250.

The product of its (nonzero) digits is 16464, while the sum is 38.

Adding to 70671071081 its reverse (18017017607), we get a palindrome (88688088688).

The spelling of 70671071081 in words is "seventy billion, six hundred seventy-one million, seventy-one thousand, eighty-one".

Divisors: 1 13 5436236237 70671071081