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70646401009 = 509712919469
BaseRepresentation
bin100000111001011011…
…0101000011111110001
320202100110200000100201
41001302312220133301
52124140434313014
652242101315201
75050453333462
oct1016266503761
9222313600321
1070646401009
1127a63062788
1211837405b01
13687b33b462
1435c27dad69
151c87246e74
hex1072da87f1

70646401009 has 8 divisors (see below), whose sum is σ = 70798761000. Its totient is φ = 70494095232.

The previous prime is 70646401003. The next prime is 70646401093. The reversal of 70646401009 is 90010464607.

It can be written as a sum of positive squares in 4 ways, for example, as 20021401009 + 50625000000 = 141497^2 + 225000^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-70646401009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70646401003) 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 7 ways as a sum of consecutive naturals, for example, 3618927 + ... + 3638395.

It is an arithmetic number, because the mean of its divisors is an integer number (8849845125).

Almost surely, 270646401009 is an apocalyptic number.

It is an amenable number.

70646401009 is a deficient number, since it is larger than the sum of its proper divisors (152359991).

70646401009 is a wasteful number, since it uses less digits than its factorization.

70646401009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27107.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 70646401009 in words is "seventy billion, six hundred forty-six million, four hundred one thousand, nine".

Divisors: 1 509 7129 19469 3628661 9909721 138794501 70646401009