2557295780 has 24 divisors (see below), whose sum is σ = 5783423352. Its totient is φ = 944232192.

The previous prime is 2557295759. The next prime is 2557295789. The reversal of 2557295780 is 875927552.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 39664804 + 2517630976 = 6298^2 + 50176^2 .

It is not an unprimeable number, because it can be changed into a prime (2557295789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4917617 + ... + 4918136.

It is an arithmetic number, because the mean of its divisors is an integer number (240975973).

Almost surely, 2^2557295780 is an apocalyptic number.

2557295780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2557295780 is an abundant number, since it is smaller than the sum of its proper divisors (3226127572).

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

2557295780 is a wasteful number, since it uses less digits than its factorization.

2557295780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9835775 (or 9835773 counting only the distinct ones).

The product of its (nonzero) digits is 1764000, while the sum is 50.

The square root of 2557295780 is about 50569.7120814426. The cubic root of 2557295780 is about 1367.4989052237.

The spelling of 2557295780 in words is "two billion, five hundred fifty-seven million, two hundred ninety-five thousand, seven hundred eighty".