551111105506 has 32 divisors (see below), whose sum is σ = 897374625840. Its totient is φ = 252333225216.

The previous prime is 551111105437. The next prime is 551111105579. The reversal of 551111105506 is 605501111155.

It can be written as a sum of positive squares in 8 ways, for example, as 160724819025 + 390386286481 = 400905^2 + 624809^2 .

It is a super-2 number, since 2×551111105506² (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 15 ways as a sum of consecutive naturals, for example, 1482180 + ... + 1816336.

Almost surely, 2^551111105506 is an apocalyptic number.

551111105506 is a deficient number, since it is larger than the sum of its proper divisors (346263520334).

551111105506 is a wasteful number, since it uses less digits than its factorization.

551111105506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334678.

The product of its (nonzero) digits is 3750, while the sum is 31.

The spelling of 551111105506 in words is "five hundred fifty-one billion, one hundred eleven million, one hundred five thousand, five hundred six".