697609699999956 has 144 divisors (see below), whose sum is σ = 1820975174473728. Its totient is φ = 224950236825600.

The previous prime is 697609699999939. The next prime is 697609699999957. The reversal of 697609699999956 is 659999996906796.

It is a super-2 number, since 2×697609699999956² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697609699999957) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50525791605 + ... + 50525805411.

Almost surely, 2^{697609699999956} is an apocalyptic number.

It is an amenable number.

697609699999956 is an abundant number, since it is smaller than the sum of its proper divisors (1123365474473772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

697609699999956 is a wasteful number, since it uses less digits than its factorization.

697609699999956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27702 (or 27697 counting only the distinct ones).

The product of its (nonzero) digits is 1952599264560, while the sum is 108.

The spelling of 697609699999956 in words is "six hundred ninety-seven trillion, six hundred nine billion, six hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred fifty-six".