64704016992 has 48 divisors (see below), whose sum is σ = 174438541872. Its totient is φ = 20985085440.

The previous prime is 64704016991. The next prime is 64704016997. The reversal of 64704016992 is 29961040746.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64704016991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9104559 + ... + 9111662.

It is an arithmetic number, because the mean of its divisors is an integer number (3634136289).

Almost surely, 2^64704016992 is an apocalyptic number.

It is an amenable number.

64704016992 is an abundant number, since it is smaller than the sum of its proper divisors (109734524880).

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

64704016992 is a wasteful number, since it uses less digits than its factorization.

64704016992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18216271 (or 18216263 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 64704016992 in words is "sixty-four billion, seven hundred four million, sixteen thousand, nine hundred ninety-two".