551111105505 has 32 divisors (see below), whose sum is σ = 897056870400. Its totient is φ = 288836597952.

The previous prime is 551111105437. The next prime is 551111105579. The reversal of 551111105505 is 505501111155.

It is a happy number.

It is not a de Polignac number, because 551111105505 - 2¹⁵ = 551111072737 is a prime.

It is a super-2 number, since 2×551111105505² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2291802 + ... + 2520828.

It is an arithmetic number, because the mean of its divisors is an integer number (28033027200).

Almost surely, 2^551111105505 is an apocalyptic number.

It is an amenable number.

551111105505 is a deficient number, since it is larger than the sum of its proper divisors (345945764895).

551111105505 is a wasteful number, since it uses less digits than its factorization.

551111105505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231813.

The product of its (nonzero) digits is 3125, while the sum is 30.

The spelling of 551111105505 in words is "five hundred fifty-one billion, one hundred eleven million, one hundred five thousand, five hundred five".