64632918 has 16 divisors (see below), whose sum is σ = 147732480. Its totient is φ = 18466536.

The previous prime is 64632877. The next prime is 64632941. The reversal of 64632918 is 81923646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769398 + ... + 769481.

It is an arithmetic number, because the mean of its divisors is an integer number (9233280).

Almost surely, 2^64632918 is an apocalyptic number.

64632918 is an abundant number, since it is smaller than the sum of its proper divisors (83099562).

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

64632918 is a wasteful number, since it uses less digits than its factorization.

64632918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538891.

The product of its digits is 62208, while the sum is 39.

The square root of 64632918 is about 8039.4600564963. The cubic root of 64632918 is about 401.3142562635.

The spelling of 64632918 in words is "sixty-four million, six hundred thirty-two thousand, nine hundred eighteen".