2557781225568 has 48 divisors (see below), whose sum is σ = 7460195243760. Its totient is φ = 852593741568.

The previous prime is 2557781225563. The next prime is 2557781225569. The reversal of 2557781225568 is 8655221877552.

2557781225568 is a `hidden beast` number, since 2 + 5 + 5 + 7 + 78 + 1 + 2 + 2 + 556 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557781225563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1480196605 + ... + 1480198332.

It is an arithmetic number, because the mean of its divisors is an integer number (155420734245).

Almost surely, 2^{2557781225568} is an apocalyptic number.

It is an amenable number.

2557781225568 is an abundant number, since it is smaller than the sum of its proper divisors (4902414018192).

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

2557781225568 is a wasteful number, since it uses less digits than its factorization.

2557781225568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2960394956 (or 2960394942 counting only the distinct ones).

The product of its digits is 94080000, while the sum is 63.

The spelling of 2557781225568 in words is "two trillion, five hundred fifty-seven billion, seven hundred eighty-one million, two hundred twenty-five thousand, five hundred sixty-eight".