55556065551 has 16 divisors (see below), whose sum is σ = 84696545024. Its totient is φ = 31731441984.

The previous prime is 55556065547. The next prime is 55556065567. The reversal of 55556065551 is 15556065555.

It is not a de Polignac number, because 55556065551 - 2² = 55556065547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55556065551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55556065541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 574105 + ... + 663858.

It is an arithmetic number, because the mean of its divisors is an integer number (5293534064).

Almost surely, 2^55556065551 is an apocalyptic number.

55556065551 is a deficient number, since it is larger than the sum of its proper divisors (29140479473).

55556065551 is a wasteful number, since it uses less digits than its factorization.

55556065551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240110.

The product of its (nonzero) digits is 2812500, while the sum is 48.

The spelling of 55556065551 in words is "fifty-five billion, five hundred fifty-six million, sixty-five thousand, five hundred fifty-one".