64632155 has 32 divisors (see below), whose sum is σ = 94227840. Its totient is φ = 41610240.

The previous prime is 64632151. The next prime is 64632157. The reversal of 64632155 is 55123646.

It is not a de Polignac number, because 64632155 - 2² = 64632151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64632151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36695 + ... + 38415.

It is an arithmetic number, because the mean of its divisors is an integer number (2944620).

Almost surely, 2^64632155 is an apocalyptic number.

64632155 is a deficient number, since it is larger than the sum of its proper divisors (29595685).

64632155 is a wasteful number, since it uses less digits than its factorization.

64632155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799.

The product of its digits is 21600, while the sum is 32.

The square root of 64632155 is about 8039.4126029207. The cubic root of 64632155 is about 401.3126770683.

The spelling of 64632155 in words is "sixty-four million, six hundred thirty-two thousand, one hundred fifty-five".