51010105561566 has 32 divisors (see below), whose sum is σ = 109388759523840. Its totient is φ = 15800598592896.

The previous prime is 51010105561561. The next prime is 51010105561603. The reversal of 51010105561566 is 66516550101015.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51010105561561) 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, 3165175956 + ... + 3165192071.

It is an arithmetic number, because the mean of its divisors is an integer number (3418398735120).

Almost surely, 2^{51010105561566} is an apocalyptic number.

51010105561566 is an abundant number, since it is smaller than the sum of its proper divisors (58378653962274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51010105561566 is a wasteful number, since it uses less digits than its factorization.

51010105561566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6330368128.

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 51010105561566 in words is "fifty-one trillion, ten billion, one hundred five million, five hundred sixty-one thousand, five hundred sixty-six".