55105550556 has 24 divisors (see below), whose sum is σ = 146948135040. Its totient is φ = 15744442992.

The previous prime is 55105550551. The next prime is 55105550567. The reversal of 55105550556 is 65505550155.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55105550551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328009146 + ... + 328009313.

It is an arithmetic number, because the mean of its divisors is an integer number (6122838960).

Almost surely, 2^55105550556 is an apocalyptic number.

It is an amenable number.

55105550556 is an abundant number, since it is smaller than the sum of its proper divisors (91842584484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55105550556 is a wasteful number, since it uses less digits than its factorization.

55105550556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656018473 (or 656018471 counting only the distinct ones).

The product of its (nonzero) digits is 468750, while the sum is 42.

The spelling of 55105550556 in words is "fifty-five billion, one hundred five million, five hundred fifty thousand, five hundred fifty-six".