64918144 has 32 divisors (see below), whose sum is σ = 134958240. Its totient is φ = 31046400.

The previous prime is 64918127. The next prime is 64918151. The reversal of 64918144 is 44181946.

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8082 + ... + 13969.

It is an arithmetic number, because the mean of its divisors is an integer number (4217445).

Almost surely, 2^64918144 is an apocalyptic number.

64918144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

64918144 is an abundant number, since it is smaller than the sum of its proper divisors (70040096).

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

64918144 is a wasteful number, since it uses less digits than its factorization.

64918144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22088 (or 22076 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 64918144 is about 8057.1796554378. The cubic root of 64918144 is about 401.9037252021.

The spelling of 64918144 in words is "sixty-four million, nine hundred eighteen thousand, one hundred forty-four".