50561155659 has 32 divisors (see below), whose sum is σ = 81685863936. Its totient is φ = 27156487680.

The previous prime is 50561155633. The next prime is 50561155669. The reversal of 50561155659 is 95655116505.

It is a happy number.

It is not a de Polignac number, because 50561155659 - 2⁵ = 50561155627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50561155669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176704 + ... + 363794.

It is an arithmetic number, because the mean of its divisors is an integer number (2552683248).

Almost surely, 2^50561155659 is an apocalyptic number.

50561155659 is a deficient number, since it is larger than the sum of its proper divisors (31124708277).

50561155659 is a wasteful number, since it uses less digits than its factorization.

50561155659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187875.

The product of its (nonzero) digits is 1012500, while the sum is 48.

It can be divided in two parts, 505611 and 55659, that added together give a triangular number (561270 = T₁₀₅₉).

The spelling of 50561155659 in words is "fifty billion, five hundred sixty-one million, one hundred fifty-five thousand, six hundred fifty-nine".