2557401967 has 2 divisors, whose sum is σ = 2557401968. Its totient is φ = 2557401966.

The previous prime is 2557401877. The next prime is 2557401991. The reversal of 2557401967 is 7691047552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2557401967 - 2¹¹ = 2557399919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557401997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278700983 + 1278700984.

It is an arithmetic number, because the mean of its divisors is an integer number (1278700984).

Almost surely, 2^2557401967 is an apocalyptic number.

2557401967 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557401967 is an equidigital number, since it uses as much as digits as its factorization.

2557401967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 46.

The square root of 2557401967 is about 50570.7619776487. The cubic root of 2557401967 is about 1367.5178325867.

The spelling of 2557401967 in words is "two billion, five hundred fifty-seven million, four hundred one thousand, nine hundred sixty-seven".