51566655651 has 32 divisors (see below), whose sum is σ = 80102131200. Its totient is φ = 28895602944.

The previous prime is 51566655641. The next prime is 51566655653. The reversal of 51566655651 is 15655666515.

It is not a de Polignac number, because 51566655651 - 2⁵ = 51566655619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51566655594 and 51566655603.

It is not an unprimeable number, because it can be changed into a prime (51566655653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2325151 + ... + 2347223.

It is an arithmetic number, because the mean of its divisors is an integer number (2503191600).

Almost surely, 2^51566655651 is an apocalyptic number.

51566655651 is a deficient number, since it is larger than the sum of its proper divisors (28535475549).

51566655651 is a wasteful number, since it uses less digits than its factorization.

51566655651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24235.

The product of its digits is 4050000, while the sum is 51.

The spelling of 51566655651 in words is "fifty-one billion, five hundred sixty-six million, six hundred fifty-five thousand, six hundred fifty-one".