64731960 has 80 divisors (see below), whose sum is σ = 217582200. Its totient is φ = 17260992.

The previous prime is 64731943. The next prime is 64731977. The reversal of 64731960 is 6913746.

64731960 is a `hidden beast` number, since 647 + 3 + 1 + 9 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (64731943) and next prime (64731977).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6750 + ... + 13229.

Almost surely, 2^64731960 is an apocalyptic number.

64731960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64731960 is an abundant number, since it is smaller than the sum of its proper divisors (152850240).

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

64731960 is a wasteful number, since it uses less digits than its factorization.

64731960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20002 (or 19989 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 64731960 is about 8045.6174405697. The cubic root of 64731960 is about 401.5191398977.

The spelling of 64731960 in words is "sixty-four million, seven hundred thirty-one thousand, nine hundred sixty".