2557401956 has 12 divisors (see below), whose sum is σ = 4475942268. Its totient is φ = 1278561312.

The previous prime is 2557401877. The next prime is 2557401967. The reversal of 2557401956 is 6591047552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 937339456 + 1620062500 = 30616^2 + 40250^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13850 + ... + 72846.

It is an arithmetic number, because the mean of its divisors is an integer number (372995189).

Almost surely, 2^2557401956 is an apocalyptic number.

It is an amenable number.

2557401956 is a deficient number, since it is larger than the sum of its proper divisors (1918540312).

2557401956 is a wasteful number, since it uses less digits than its factorization.

2557401956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69838 (or 69836 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 44.

The square root of 2557401956 is about 50570.7618688902. The cubic root of 2557401956 is about 1367.5178306260.

The spelling of 2557401956 in words is "two billion, five hundred fifty-seven million, four hundred one thousand, nine hundred fifty-six".