156064640 has 32 divisors (see below), whose sum is σ = 373093560. Its totient is φ = 62425600.

The previous prime is 156064627. The next prime is 156064661. The reversal of 156064640 is 46460651.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 156064597 and 156064606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121286 + ... + 122565.

Almost surely, 2^156064640 is an apocalyptic number.

156064640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156064640 is an abundant number, since it is smaller than the sum of its proper divisors (217028920).

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

156064640 is an equidigital number, since it uses as much as digits as its factorization.

156064640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243870 (or 243858 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 156064640 is about 12492.5833997616. The cubic root of 156064640 is about 538.3956036901.

The spelling of 156064640 in words is "one hundred fifty-six million, sixty-four thousand, six hundred forty".