51560551555 has 4 divisors (see below), whose sum is σ = 61872661872. Its totient is φ = 41248441240.

The previous prime is 51560551543. The next prime is 51560551561. The reversal of 51560551555 is 55515506515.

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

It is not a de Polignac number, because 51560551555 - 2¹⁵ = 51560518787 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5156055151 + ... + 5156055160.

It is an arithmetic number, because the mean of its divisors is an integer number (15468165468).

Almost surely, 2^51560551555 is an apocalyptic number.

51560551555 is a deficient number, since it is larger than the sum of its proper divisors (10312110317).

51560551555 is a wasteful number, since it uses less digits than its factorization.

51560551555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10312110316.

The product of its (nonzero) digits is 468750, while the sum is 43.

The spelling of 51560551555 in words is "fifty-one billion, five hundred sixty million, five hundred fifty-one thousand, five hundred fifty-five".