156644138 has 32 divisors (see below), whose sum is σ = 283737600. Its totient is φ = 63431424.

The previous prime is 156644129. The next prime is 156644177. The reversal of 156644138 is 831446651.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14978 + ... + 23186.

It is an arithmetic number, because the mean of its divisors is an integer number (8866800).

Almost surely, 2^156644138 is an apocalyptic number.

156644138 is a deficient number, since it is larger than the sum of its proper divisors (127093462).

156644138 is a wasteful number, since it uses less digits than its factorization.

156644138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8294.

The product of its digits is 69120, while the sum is 38.

The square root of 156644138 is about 12515.7555904548. The cubic root of 156644138 is about 539.0611693583.

The spelling of 156644138 in words is "one hundred fifty-six million, six hundred forty-four thousand, one hundred thirty-eight".