55111010605605 has 24 divisors (see below), whose sum is σ = 97328124394488. Its totient is φ = 28837962781056.

The previous prime is 55111010605601. The next prime is 55111010605657. The reversal of 55111010605605 is 50650601011155.

It is a happy number.

55111010605605 is a `hidden beast` number, since 5 + 5 + 11 + 10 + 10 + 60 + 560 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 25530312879009 + 29580697726596 = 5052753^2 + 5438814^2 .

It is not a de Polignac number, because 55111010605605 - 2² = 55111010605601 is a prime.

It is a super-2 number, since 2×55111010605605² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55111010605605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55111010605601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11553668602 + ... + 11553673371.

It is an arithmetic number, because the mean of its divisors is an integer number (4055338516437).

Almost surely, 2^{55111010605605} is an apocalyptic number.

It is an amenable number.

55111010605605 is a deficient number, since it is larger than the sum of its proper divisors (42217113788883).

55111010605605 is a wasteful number, since it uses less digits than its factorization.

55111010605605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23107342037 (or 23107342034 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 55111010605605 in words is "fifty-five trillion, one hundred eleven billion, ten million, six hundred five thousand, six hundred five".