64155968 has 28 divisors (see below), whose sum is σ = 127589280. Its totient is φ = 32007552.

The previous prime is 64155937. The next prime is 64155991. The reversal of 64155968 is 86955146.

It is a congruent number.

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, 40373 + ... + 41931.

It is an arithmetic number, because the mean of its divisors is an integer number (4556760).

Almost surely, 2^64155968 is an apocalyptic number.

It is an amenable number.

64155968 is a deficient number, since it is larger than the sum of its proper divisors (63433312).

64155968 is a wasteful number, since it uses less digits than its factorization.

64155968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214 (or 2204 counting only the distinct ones).

The product of its digits is 259200, while the sum is 44.

The square root of 64155968 is about 8009.7420682566. The cubic root of 64155968 is about 400.3246697359.

The spelling of 64155968 in words is "sixty-four million, one hundred fifty-five thousand, nine hundred sixty-eight".