156997695768 has 16 divisors (see below), whose sum is σ = 392494239480. Its totient is φ = 52332565248.

The previous prime is 156997695727. The next prime is 156997695781. The reversal of 156997695768 is 867596799651.

It is a super-2 number, since 2×156997695768² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 156997695693 and 156997695702.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3270785305 + ... + 3270785352.

Almost surely, 2^156997695768 is an apocalyptic number.

It is an amenable number.

156997695768 is an abundant number, since it is smaller than the sum of its proper divisors (235496543712).

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

156997695768 is a wasteful number, since it uses less digits than its factorization.

156997695768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6541570666 (or 6541570662 counting only the distinct ones).

The product of its digits is 1543147200, while the sum is 78.

The spelling of 156997695768 in words is "one hundred fifty-six billion, nine hundred ninety-seven million, six hundred ninety-five thousand, seven hundred sixty-eight".