7931812056 has 128 divisors (see below), whose sum is σ = 22851072000. Its totient is φ = 2247460992.

The previous prime is 7931812037. The next prime is 7931812061. The reversal of 7931812056 is 6502181397.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 7931811999 and 7931812017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20928075 + ... + 20928453.

It is an arithmetic number, because the mean of its divisors is an integer number (178524000).

Almost surely, 2^7931812056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7931812056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11425536000).

7931812056 is an abundant number, since it is smaller than the sum of its proper divisors (14919259944).

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

7931812056 is a wasteful number, since it uses less digits than its factorization.

7931812056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 7931812056 is about 89060.7211738149. The cubic root of 7931812056 is about 1994.3014500184.

The spelling of 7931812056 in words is "seven billion, nine hundred thirty-one million, eight hundred twelve thousand, fifty-six".