64545156 has 81 divisors (see below), whose sum is σ = 178403589. Its totient is φ = 19667232.

The previous prime is 64545059. The next prime is 64545157. The reversal of 64545156 is 65154546.

64545156 = T₅₃ + T₅₄ + ... + T₇₂₈.

The square root of 64545156 is 8034.

It is a perfect power (a square), and thus also a powerful number.

64545156 is a `hidden beast` number, since 64 + 545 + 1 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9548100 + 54997056 = 3090^2 + 7416^2 .

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 64545156.

It is not an unprimeable number, because it can be changed into a prime (64545157) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 626601 + ... + 626703.

Almost surely, 2^64545156 is an apocalyptic number.

64545156 is the 8034-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64545156

64545156 is an abundant number, since it is smaller than the sum of its proper divisors (113858433).

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

64545156 is a wasteful number, since it uses less digits than its factorization.

64545156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 121 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The cubic root of 64545156 is about 401.1325320682.

Multiplying 64545156 by its sum of digits (36), we get a square (2323625616 = 48204²).

64545156 divided by its sum of digits (36) gives a square (1792921 = 1339²).

The spelling of 64545156 in words is "sixty-four million, five hundred forty-five thousand, one hundred fifty-six".