64767673520 has 80 divisors (see below), whose sum is σ = 165809887488. Its totient is φ = 23331736320.

The previous prime is 64767673519. The next prime is 64767673543. The reversal of 64767673520 is 2537676746.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249764 + ... + 438083.

Almost surely, 2^64767673520 is an apocalyptic number.

It is an amenable number.

64767673520 is an abundant number, since it is smaller than the sum of its proper divisors (101042213968).

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

64767673520 is a wasteful number, since it uses less digits than its factorization.

64767673520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687978 (or 687972 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 53.

The spelling of 64767673520 in words is "sixty-four billion, seven hundred sixty-seven million, six hundred seventy-three thousand, five hundred twenty".