156966659381 has 32 divisors (see below), whose sum is σ = 183047040000. Its totient is φ = 131830013952.

The previous prime is 156966659371. The next prime is 156966659389. The reversal of 156966659381 is 183956669651.

It is not a de Polignac number, because 156966659381 - 2²⁶ = 156899550517 is a prime.

It is a super-2 number, since 2×156966659381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156966659389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48912905 + ... + 48916113.

It is an arithmetic number, because the mean of its divisors is an integer number (5720220000).

Almost surely, 2^156966659381 is an apocalyptic number.

It is an amenable number.

156966659381 is a deficient number, since it is larger than the sum of its proper divisors (26080380619).

156966659381 is a wasteful number, since it uses less digits than its factorization.

156966659381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3941.

The product of its digits is 62985600, while the sum is 65.

The spelling of 156966659381 in words is "one hundred fifty-six billion, nine hundred sixty-six million, six hundred fifty-nine thousand, three hundred eighty-one".