2557881123732 has 96 divisors (see below), whose sum is σ = 7249267952640. Its totient is φ = 773523704160.

The previous prime is 2557881123697. The next prime is 2557881123739. The reversal of 2557881123732 is 2373211887552.

2557881123732 is a `hidden beast` number, since 2 + 5 + 578 + 8 + 1 + 1 + 2 + 37 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557881123739) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1632018 + ... + 2789129.

It is an arithmetic number, because the mean of its divisors is an integer number (75513207840).

Almost surely, 2^{2557881123732} is an apocalyptic number.

2557881123732 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2557881123732 is an abundant number, since it is smaller than the sum of its proper divisors (4691386828908).

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

2557881123732 is a wasteful number, since it uses less digits than its factorization.

2557881123732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421658 (or 4421650 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 54.

The spelling of 2557881123732 in words is "two trillion, five hundred fifty-seven billion, eight hundred eighty-one million, one hundred twenty-three thousand, seven hundred thirty-two".