2556511100540 has 12 divisors (see below), whose sum is σ = 5368673311176. Its totient is φ = 1022604440208.

The previous prime is 2556511100513. The next prime is 2556511100551. The reversal of 2556511100540 is 450011156552.

It is a self number, because there is not a number n which added to its sum of digits gives 2556511100540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63912777494 + ... + 63912777533.

It is an arithmetic number, because the mean of its divisors is an integer number (447389442598).

Almost surely, 2^{2556511100540} is an apocalyptic number.

2556511100540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2556511100540 is an abundant number, since it is smaller than the sum of its proper divisors (2812162210636).

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

2556511100540 is a wasteful number, since it uses less digits than its factorization.

2556511100540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127825555036 (or 127825555034 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 35.

The spelling of 2556511100540 in words is "two trillion, five hundred fifty-six billion, five hundred eleven million, one hundred thousand, five hundred forty".