156989636 has 6 divisors (see below), whose sum is σ = 274731870. Its totient is φ = 78494816.

The previous prime is 156989627. The next prime is 156989671. The reversal of 156989636 is 636989651.

156989636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 132388036 + 24601600 = 11506^2 + 4960^2 .

It is a super-2 number, since 2×156989636² = 49291491622824992, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19623701 + ... + 19623708.

It is an arithmetic number, because the mean of its divisors is an integer number (45788645).

Almost surely, 2^156989636 is an apocalyptic number.

It is an amenable number.

156989636 is a deficient number, since it is larger than the sum of its proper divisors (117742234).

156989636 is a wasteful number, since it uses less digits than its factorization.

156989636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39247413 (or 39247411 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 53.

The square root of 156989636 is about 12529.5505106927. The cubic root of 156989636 is about 539.4572003394.

The spelling of 156989636 in words is "one hundred fifty-six million, nine hundred eighty-nine thousand, six hundred thirty-six".