70681821511 has 8 divisors (see below), whose sum is σ = 85030762880. Its totient is φ = 57395764728.

The previous prime is 70681821491. The next prime is 70681821631. The reversal of 70681821511 is 11512818607.

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

It is a cyclic number.

It is not a de Polignac number, because 70681821511 - 2³⁵ = 36322083143 is a prime.

It is a super-2 number, since 2×70681821511² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70681821011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265721001 + ... + 265721266.

It is an arithmetic number, because the mean of its divisors is an integer number (10628845360).

Almost surely, 2^70681821511 is an apocalyptic number.

70681821511 is a deficient number, since it is larger than the sum of its proper divisors (14348941369).

70681821511 is a wasteful number, since it uses less digits than its factorization.

70681821511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531442293.

The product of its (nonzero) digits is 26880, while the sum is 40.

The spelling of 70681821511 in words is "seventy billion, six hundred eighty-one million, eight hundred twenty-one thousand, five hundred eleven".