2557166767542 has 48 divisors (see below), whose sum is σ = 5864873311440. Its totient is φ = 803856747456.

The previous prime is 2557166767523. The next prime is 2557166767553. The reversal of 2557166767542 is 2457676617552.

2557166767542 is a `hidden beast` number, since 2 + 5 + 5 + 7 + 16 + 6 + 76 + 7 + 542 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2557166767542.

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 23 ways as a sum of consecutive naturals, for example, 56940193 + ... + 56985084.

It is an arithmetic number, because the mean of its divisors is an integer number (122184860655).

Almost surely, 2^{2557166767542} is an apocalyptic number.

2557166767542 is an abundant number, since it is smaller than the sum of its proper divisors (3307706543898).

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

2557166767542 is a wasteful number, since it uses less digits than its factorization.

2557166767542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113925357 (or 113925354 counting only the distinct ones).

The product of its digits is 148176000, while the sum is 63.

The spelling of 2557166767542 in words is "two trillion, five hundred fifty-seven billion, one hundred sixty-six million, seven hundred sixty-seven thousand, five hundred forty-two".