53522721664640 has 64 divisors (see below), whose sum is σ = 127954538364960. Its totient is φ = 21408790520832.

The previous prime is 53522721664597. The next prime is 53522721664703. The reversal of 53522721664640 is 4646612722535.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48661247 + ... + 49748993.

Almost surely, 2^{53522721664640} is an apocalyptic number.

It is an amenable number.

53522721664640 is an abundant number, since it is smaller than the sum of its proper divisors (74431816700320).

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

53522721664640 is a wasteful number, since it uses less digits than its factorization.

53522721664640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164649 (or 1164637 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 53.

The spelling of 53522721664640 in words is "fifty-three trillion, five hundred twenty-two billion, seven hundred twenty-one million, six hundred sixty-four thousand, six hundred forty".