2551511551554 has 24 divisors (see below), whose sum is σ = 6318028604160. Its totient is φ = 729003300408.

The previous prime is 2551511551553. The next prime is 2551511551571. The reversal of 2551511551554 is 4551551151552.

2551511551554 is a `hidden beast` number, since 2 + 5 + 5 + 15 + 115 + 515 + 5 + 4 = 666.

It is a super-2 number, since 2×2551511551554² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2551511551553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10125045714 + ... + 10125045965.

It is an arithmetic number, because the mean of its divisors is an integer number (263251191840).

Almost surely, 2^{2551511551554} is an apocalyptic number.

2551511551554 is an abundant number, since it is smaller than the sum of its proper divisors (3766517052606).

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

2551511551554 is a wasteful number, since it uses less digits than its factorization.

2551511551554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20250091694 (or 20250091691 counting only the distinct ones).

The product of its digits is 625000, while the sum is 45.

The spelling of 2551511551554 in words is "two trillion, five hundred fifty-one billion, five hundred eleven million, five hundred fifty-one thousand, five hundred fifty-four".