55111010555605 has 4 divisors (see below), whose sum is σ = 66133212666732. Its totient is φ = 44088808444480.

The previous prime is 55111010555597. The next prime is 55111010555609. The reversal of 55111010555605 is 50655501011155.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14943783386961 + 40167227168644 = 3865719^2 + 6337762^2 .

It is not a de Polignac number, because 55111010555605 - 2³ = 55111010555597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55111010555609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5511101055556 + ... + 5511101055565.

It is an arithmetic number, because the mean of its divisors is an integer number (16533303166683).

Almost surely, 2^{55111010555605} is an apocalyptic number.

It is an amenable number.

55111010555605 is a deficient number, since it is larger than the sum of its proper divisors (11022202111127).

55111010555605 is a wasteful number, since it uses less digits than its factorization.

55111010555605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11022202111126.

The product of its (nonzero) digits is 93750, while the sum is 40.

The spelling of 55111010555605 in words is "fifty-five trillion, one hundred eleven billion, ten million, five hundred fifty-five thousand, six hundred five".