156845961 has 12 divisors (see below), whose sum is σ = 239882292. Its totient is φ = 98413056.

The previous prime is 156845939. The next prime is 156845977. The reversal of 156845961 is 169548651.

156845961 is a `hidden beast` number, since 1 + 56 + 8 + 4 + 596 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 140564736 + 16281225 = 11856^2 + 4035^2 .

It is not a de Polignac number, because 156845961 - 2⁵ = 156845929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (156845911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 512416 + ... + 512721.

It is an arithmetic number, because the mean of its divisors is an integer number (19990191).

Almost surely, 2^156845961 is an apocalyptic number.

It is an amenable number.

156845961 is a deficient number, since it is larger than the sum of its proper divisors (83036331).

156845961 is a wasteful number, since it uses less digits than its factorization.

156845961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025160 (or 1025157 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 156845961 is about 12523.8157523975. The cubic root of 156845961 is about 539.2925818937.

The spelling of 156845961 in words is "one hundred fifty-six million, eight hundred forty-five thousand, nine hundred sixty-one".