645013152 has 96 divisors (see below), whose sum is σ = 2150064000. Its totient is φ = 184287744.

The previous prime is 645013111. The next prime is 645013163. The reversal of 645013152 is 251310546.

645013152 is a `hidden beast` number, since 6 + 4 + 501 + 3 + 152 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 47277 + ... + 59372.

It is an arithmetic number, because the mean of its divisors is an integer number (22396500).

Almost surely, 2^645013152 is an apocalyptic number.

It is an amenable number.

645013152 is an abundant number, since it is smaller than the sum of its proper divisors (1505050848).

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

645013152 is a wasteful number, since it uses less digits than its factorization.

645013152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106675 (or 106661 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 645013152 is about 25397.1091268278. The cubic root of 645013152 is about 864.0181323355.

Adding to 645013152 its reverse (251310546), we get a palindrome (896323698).

The spelling of 645013152 in words is "six hundred forty-five million, thirteen thousand, one hundred fifty-two".