9972720757682 has 32 divisors (see below), whose sum is σ = 16126282742400. Its totient is φ = 4611273408000.

The previous prime is 9972720757667. The next prime is 9972720757697. The reversal of 9972720757682 is 2867570272799.

It is an interprime number because it is at equal distance from previous prime (9972720757667) and next prime (9972720757697).

It is a Harshad number since it is a multiple of its sum of digits (71).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18026207 + ... + 18571202.

It is an arithmetic number, because the mean of its divisors is an integer number (503946335700).

Almost surely, 2^{9972720757682} is an apocalyptic number.

9972720757682 is a deficient number, since it is larger than the sum of its proper divisors (6153561984718).

9972720757682 is a wasteful number, since it uses less digits than its factorization.

9972720757682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36597602.

The product of its (nonzero) digits is 373403520, while the sum is 71.

The spelling of 9972720757682 in words is "nine trillion, nine hundred seventy-two billion, seven hundred twenty million, seven hundred fifty-seven thousand, six hundred eighty-two".