5551111015551 has 12 divisors (see below), whose sum is σ = 8030978719920. Its totient is φ = 3694875791040.

The previous prime is 5551111015537. The next prime is 5551111015577. The reversal of 5551111015551 is 1555101111555.

5551111015551 is a `hidden beast` number, since 5 + 551 + 1 + 1 + 1 + 0 + 1 + 55 + 51 = 666.

It is not a de Polignac number, because 5551111015551 - 2⁵ = 5551111015519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551111015501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 488734506 + ... + 488745863.

It is an arithmetic number, because the mean of its divisors is an integer number (669248226660).

Almost surely, 2^{5551111015551} is an apocalyptic number.

5551111015551 is a deficient number, since it is larger than the sum of its proper divisors (2479867704369).

5551111015551 is a wasteful number, since it uses less digits than its factorization.

5551111015551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977481006 (or 977481003 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 36.

The spelling of 5551111015551 in words is "five trillion, five hundred fifty-one billion, one hundred eleven million, fifteen thousand, five hundred fifty-one".