64473604720 has 80 divisors (see below), whose sum is σ = 171409832640. Its totient is φ = 22093074432.

The previous prime is 64473604717. The next prime is 64473604739. The reversal of 64473604720 is 2740637446.

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

It is a congruent number.

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, 1018146 + ... + 1079614.

It is an arithmetic number, because the mean of its divisors is an integer number (2142622908).

Almost surely, 2^64473604720 is an apocalyptic number.

It is an amenable number.

64473604720 is an abundant number, since it is smaller than the sum of its proper divisors (106936227920).

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

64473604720 is a wasteful number, since it uses less digits than its factorization.

64473604720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63362 (or 63356 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 43.

The spelling of 64473604720 in words is "sixty-four billion, four hundred seventy-three million, six hundred four thousand, seven hundred twenty".