7920974556 has 48 divisors (see below), whose sum is σ = 22402759680. Its totient is φ = 2400294960.

The previous prime is 7920974539. The next prime is 7920974563. The reversal of 7920974556 is 6554790297.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 3332556 + ... + 3334931.

It is an arithmetic number, because the mean of its divisors is an integer number (466724160).

Almost surely, 2^7920974556 is an apocalyptic number.

It is an amenable number.

7920974556 is an abundant number, since it is smaller than the sum of its proper divisors (14481785124).

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

7920974556 is a wasteful number, since it uses less digits than its factorization.

7920974556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6667511 (or 6667503 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 54.

The square root of 7920974556 is about 88999.8570560650. The cubic root of 7920974556 is about 1993.3927424443.

The spelling of 7920974556 in words is "seven billion, nine hundred twenty million, nine hundred seventy-four thousand, five hundred fifty-six".