156645906 has 16 divisors (see below), whose sum is σ = 313420800. Its totient is φ = 52193808.

The previous prime is 156645887. The next prime is 156645913. The reversal of 156645906 is 609546651.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18735 + ... + 25773.

It is an arithmetic number, because the mean of its divisors is an integer number (19588800).

Almost surely, 2^156645906 is an apocalyptic number.

156645906 is an abundant number, since it is smaller than the sum of its proper divisors (156774894).

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

156645906 is a wasteful number, since it uses less digits than its factorization.

156645906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10753.

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 156645906 is about 12515.8262212289. The cubic root of 156645906 is about 539.0631974299.

The spelling of 156645906 in words is "one hundred fifty-six million, six hundred forty-five thousand, nine hundred six".