64573073436720 has 80 divisors (see below), whose sum is σ = 200191463926272. Its totient is φ = 17218201409280.

The previous prime is 64573073436719. The next prime is 64573073436743. The reversal of 64573073436720 is 2763437037546.

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, 6812472 + ... + 13249751.

Almost surely, 2^{64573073436720} is an apocalyptic number.

64573073436720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64573073436720 is an abundant number, since it is smaller than the sum of its proper divisors (135618390489552).

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

64573073436720 is a wasteful number, since it uses less digits than its factorization.

64573073436720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20075650 (or 20075644 counting only the distinct ones).

The product of its (nonzero) digits is 53343360, while the sum is 57.

The spelling of 64573073436720 in words is "sixty-four trillion, five hundred seventy-three billion, seventy-three million, four hundred thirty-six thousand, seven hundred twenty".