7921212792 has 32 divisors (see below), whose sum is σ = 20286035280. Its totient is φ = 2576003840.

The previous prime is 7921212787. The next prime is 7921212809. The reversal of 7921212792 is 2972121297.

It is a super-2 number, since 2×7921212792² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 4024023 + ... + 4025990.

Almost surely, 2^7921212792 is an apocalyptic number.

It is an amenable number.

7921212792 is an abundant number, since it is smaller than the sum of its proper divisors (12364822488).

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

7921212792 is a wasteful number, since it uses less digits than its factorization.

7921212792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8050063 (or 8050059 counting only the distinct ones).

The product of its digits is 63504, while the sum is 42.

The square root of 7921212792 is about 89001.1954526455. The cubic root of 7921212792 is about 1993.4127270707.

The spelling of 7921212792 in words is "seven billion, nine hundred twenty-one million, two hundred twelve thousand, seven hundred ninety-two".