2556307698 has 16 divisors (see below), whose sum is σ = 5842989120. Its totient is φ = 730373616.

The previous prime is 2556307679. The next prime is 2556307703. The reversal of 2556307698 is 8967036552.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2556307698.

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, 30432193 + ... + 30432276.

It is an arithmetic number, because the mean of its divisors is an integer number (365186820).

Almost surely, 2^2556307698 is an apocalyptic number.

2556307698 is an abundant number, since it is smaller than the sum of its proper divisors (3286681422).

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

2556307698 is a wasteful number, since it uses less digits than its factorization.

2556307698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60864481.

The product of its (nonzero) digits is 2721600, while the sum is 51.

The square root of 2556307698 is about 50559.9416336688. The cubic root of 2556307698 is about 1367.3227588525.

The spelling of 2556307698 in words is "two billion, five hundred fifty-six million, three hundred seven thousand, six hundred ninety-eight".