51106565566 has 48 divisors (see below), whose sum is σ = 91692881280. Its totient is φ = 21292165440.

The previous prime is 51106565561. The next prime is 51106565567. The reversal of 51106565566 is 66556560115.

It is a super-2 number, since 2×51106565566² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51106565561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 521011 + ... + 611281.

It is an arithmetic number, because the mean of its divisors is an integer number (1910268360).

Almost surely, 2^51106565566 is an apocalyptic number.

51106565566 is a deficient number, since it is larger than the sum of its proper divisors (40586315714).

51106565566 is a wasteful number, since it uses less digits than its factorization.

51106565566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90449 (or 90442 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 51106565566 in words is "fifty-one billion, one hundred six million, five hundred sixty-five thousand, five hundred sixty-six".