551511556101 has 24 divisors (see below), whose sum is σ = 885445662816. Its totient is φ = 327942831840.

The previous prime is 551511556093. The next prime is 551511556117. The reversal of 551511556101 is 101655115155.

551511556101 is a `hidden beast` number, since 5 + 51 + 51 + 1 + 556 + 1 + 0 + 1 = 666.

It is not a de Polignac number, because 551511556101 - 2³ = 551511556093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551511556601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52549695 + ... + 52560188.

It is an arithmetic number, because the mean of its divisors is an integer number (36893569284).

Almost surely, 2^551511556101 is an apocalyptic number.

It is an amenable number.

551511556101 is a deficient number, since it is larger than the sum of its proper divisors (333934106715).

551511556101 is a wasteful number, since it uses less digits than its factorization.

551511556101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105109953 (or 105109950 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 36.

The spelling of 551511556101 in words is "five hundred fifty-one billion, five hundred eleven million, five hundred fifty-six thousand, one hundred one".