55155551565 has 16 divisors (see below), whose sum is σ = 88266312000. Its totient is φ = 29410484352.

The previous prime is 55155551551. The next prime is 55155551593. The reversal of 55155551565 is 56515555155.

It is not a de Polignac number, because 55155551565 - 2¹¹ = 55155549517 is a prime.

It is a Curzon number.

It is a congruent number.

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, 284080 + ... + 437049.

It is an arithmetic number, because the mean of its divisors is an integer number (5516644500).

Almost surely, 2^55155551565 is an apocalyptic number.

It is an amenable number.

55155551565 is a deficient number, since it is larger than the sum of its proper divisors (33110760435).

55155551565 is a wasteful number, since it uses less digits than its factorization.

55155551565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726236.

The product of its digits is 2343750, while the sum is 48.

The spelling of 55155551565 in words is "fifty-five billion, one hundred fifty-five million, five hundred fifty-one thousand, five hundred sixty-five".