2797557978 has 16 divisors (see below), whose sum is σ = 5924240640. Its totient is φ = 877665216.

The previous prime is 2797557949. The next prime is 2797558003. The reversal of 2797557978 is 8797557972.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13713418 + ... + 13713621.

It is an arithmetic number, because the mean of its divisors is an integer number (370265040).

Almost surely, 2^2797557978 is an apocalyptic number.

2797557978 is an abundant number, since it is smaller than the sum of its proper divisors (3126682662).

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

2797557978 is a wasteful number, since it uses less digits than its factorization.

2797557978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27427061.

The product of its digits is 77792400, while the sum is 66.

The square root of 2797557978 is about 52891.9462489328. The cubic root of 2797557978 is about 1409.0498734580.

The spelling of 2797557978 in words is "two billion, seven hundred ninety-seven million, five hundred fifty-seven thousand, nine hundred seventy-eight".