32520037746721 has 6 divisors (see below), whose sum is σ = 37829431664610. Its totient is φ = 27874318068576.

The previous prime is 32520037746661. The next prime is 32520037746751. The reversal of 32520037746721 is 12764773002523.

It can be written as a sum of positive squares in only one way, i.e., 19539149336721 + 12980888410000 = 4420311^2 + 3602900^2 .

It is not a de Polignac number, because 32520037746721 - 2²⁵ = 32520004192289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 663674239729 = 32520037746721 / (3 + 2 + 5 + 2 + 0 + 0 + 3 + 7 + 7 + 4 + 6 + 7 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32520037746751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 331837119816 + ... + 331837119913.

It is an arithmetic number, because the mean of its divisors is an integer number (6304905277435).

Almost surely, 2^{32520037746721} is an apocalyptic number.

It is an amenable number.

32520037746721 is a deficient number, since it is larger than the sum of its proper divisors (5309393917889).

32520037746721 is an equidigital number, since it uses as much as digits as its factorization.

32520037746721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663674239743 (or 663674239736 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 49.

The spelling of 32520037746721 in words is "thirty-two trillion, five hundred twenty billion, thirty-seven million, seven hundred forty-six thousand, seven hundred twenty-one".