64728372976 has 20 divisors (see below), whose sum is σ = 125747457352. Its totient is φ = 32277416256.

The previous prime is 64728372971. The next prime is 64728372977. The reversal of 64728372976 is 67927382746.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64728372971) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5416986 + ... + 5428921.

Almost surely, 2^64728372976 is an apocalyptic number.

It is an amenable number.

64728372976 is a deficient number, since it is larger than the sum of its proper divisors (61019084376).

64728372976 is a wasteful number, since it uses less digits than its factorization.

64728372976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10846288 (or 10846282 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 61.

The spelling of 64728372976 in words is "sixty-four billion, seven hundred twenty-eight million, three hundred seventy-two thousand, nine hundred seventy-six".