1001720872672 has 96 divisors (see below), whose sum is σ = 2291203236672. Its totient is φ = 426926383104.

The previous prime is 1001720872661. The next prime is 1001720872721. The reversal of 1001720872672 is 2762780271001.

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, 961468 + ... + 1711099.

It is an arithmetic number, because the mean of its divisors is an integer number (23866700382).

Almost surely, 2^{1001720872672} is an apocalyptic number.

It is an amenable number.

1001720872672 is an abundant number, since it is smaller than the sum of its proper divisors (1289482364000).

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

1001720872672 is a wasteful number, since it uses less digits than its factorization.

1001720872672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2672660 (or 2672652 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 43.

The spelling of 1001720872672 in words is "one trillion, one billion, seven hundred twenty million, eight hundred seventy-two thousand, six hundred seventy-two".