64115144 has 32 divisors (see below), whose sum is σ = 125798400. Its totient is φ = 30602880.

The previous prime is 64115119. The next prime is 64115153. The reversal of 64115144 is 44151146.

It is a super-2 number, since 2×64115144² = 8221503380281472, which contains 22 as substring.

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, 13337 + ... + 17495.

It is an arithmetic number, because the mean of its divisors is an integer number (3931200).

Almost surely, 2^64115144 is an apocalyptic number.

It is an amenable number.

64115144 is a deficient number, since it is larger than the sum of its proper divisors (61683256).

64115144 is a wasteful number, since it uses less digits than its factorization.

64115144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4253 (or 4249 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 64115144 is about 8007.1932660577. The cubic root of 64115144 is about 400.2397396169.

The spelling of 64115144 in words is "sixty-four million, one hundred fifteen thousand, one hundred forty-four".