156944691 has 6 divisors (see below), whose sum is σ = 226697900. Its totient is φ = 104629788.

The previous prime is 156944687. The next prime is 156944701. The reversal of 156944691 is 196449651.

It is a happy number.

156944691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 156944691 - 2² = 156944687 is a prime.

It is a super-6 number, since 6×156944691⁶ (a number of 50 digits) contains 666666 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156944621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8719141 + ... + 8719158.

Almost surely, 2^156944691 is an apocalyptic number.

156944691 is a deficient number, since it is larger than the sum of its proper divisors (69753209).

156944691 is a wasteful number, since it uses less digits than its factorization.

156944691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17438305 (or 17438302 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 156944691 is about 12527.7568223525. The cubic root of 156944691 is about 539.4057145245.

The spelling of 156944691 in words is "one hundred fifty-six million, nine hundred forty-four thousand, six hundred ninety-one".