45172656 has 30 divisors (see below), whose sum is σ = 126421100. Its totient is φ = 15057504.

The previous prime is 45172651. The next prime is 45172657. The reversal of 45172656 is 65627154.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 45172656.

It is not an unprimeable number, because it can be changed into a prime (45172651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 156706 + ... + 156993.

Almost surely, 2^45172656 is an apocalyptic number.

It is an amenable number.

45172656 is an abundant number, since it is smaller than the sum of its proper divisors (81248444).

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

45172656 is a wasteful number, since it uses less digits than its factorization.

45172656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313713 (or 313704 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 45172656 is about 6721.0606305850. The cubic root of 45172656 is about 356.1436528364.

The spelling of 45172656 in words is "forty-five million, one hundred seventy-two thousand, six hundred fifty-six".