2557135513878 has 16 divisors (see below), whose sum is σ = 5579204757696. Its totient is φ = 774889549640.

The previous prime is 2557135513859. The next prime is 2557135513883. The reversal of 2557135513878 is 8783155317552.

It is a super-2 number, since 2×2557135513878² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19372238676 + ... + 19372238807.

It is an arithmetic number, because the mean of its divisors is an integer number (348700297356).

Almost surely, 2^{2557135513878} is an apocalyptic number.

2557135513878 is an abundant number, since it is smaller than the sum of its proper divisors (3022069243818).

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

2557135513878 is a wasteful number, since it uses less digits than its factorization.

2557135513878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38744477499.

The product of its digits is 35280000, while the sum is 60.

The spelling of 2557135513878 in words is "two trillion, five hundred fifty-seven billion, one hundred thirty-five million, five hundred thirteen thousand, eight hundred seventy-eight".