2979986656 has 12 divisors (see below), whose sum is σ = 5866848792. Its totient is φ = 1489993312.

The previous prime is 2979986621. The next prime is 2979986741. The reversal of 2979986656 is 6566899792.

It is a junction number, because it is equal to n+sod(n) for n = 2979986591 and 2979986600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46562260 + ... + 46562323.

It is an arithmetic number, because the mean of its divisors is an integer number (488904066).

Almost surely, 2^2979986656 is an apocalyptic number.

It is an amenable number.

2979986656 is a deficient number, since it is larger than the sum of its proper divisors (2886862136).

2979986656 is an equidigital number, since it uses as much as digits as its factorization.

2979986656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93124593 (or 93124585 counting only the distinct ones).

The product of its digits is 88179840, while the sum is 67.

The square root of 2979986656 is about 54589.2540341046. The cubic root of 2979986656 is about 1439.0352746102.

The spelling of 2979986656 in words is "two billion, nine hundred seventy-nine million, nine hundred eighty-six thousand, six hundred fifty-six".