2557385894387 has 2 divisors, whose sum is σ = 2557385894388. Its totient is φ = 2557385894386.

The previous prime is 2557385894257. The next prime is 2557385894417. The reversal of 2557385894387 is 7834985837552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2557385894387 - 2²⁶ = 2557318785523 is a prime.

It is a super-2 number, since 2×2557385894387² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2557385894087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278692947193 + 1278692947194.

It is an arithmetic number, because the mean of its divisors is an integer number (1278692947194).

Almost surely, 2^{2557385894387} is an apocalyptic number.

2557385894387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557385894387 is an equidigital number, since it uses as much as digits as its factorization.

2557385894387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128000, while the sum is 74.

The spelling of 2557385894387 in words is "two trillion, five hundred fifty-seven billion, three hundred eighty-five million, eight hundred ninety-four thousand, three hundred eighty-seven".