156993168007 has 4 divisors (see below), whose sum is σ = 169069565560. Its totient is φ = 144916770456.

The previous prime is 156993167987. The next prime is 156993168041. The reversal of 156993168007 is 700861399651.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156993168007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156993168077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6038198757 + ... + 6038198782.

It is an arithmetic number, because the mean of its divisors is an integer number (42267391390).

Almost surely, 2^156993168007 is an apocalyptic number.

156993168007 is a deficient number, since it is larger than the sum of its proper divisors (12076397553).

156993168007 is a wasteful number, since it uses less digits than its factorization.

156993168007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12076397552.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 156993168007 in words is "one hundred fifty-six billion, nine hundred ninety-three million, one hundred sixty-eight thousand, seven".