51561015060 has 48 divisors (see below), whose sum is σ = 144627368256. Its totient is φ = 13725172992.

The previous prime is 51561015013. The next prime is 51561015089. The reversal of 51561015060 is 6051016515.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 729409 + ... + 796968.

It is an arithmetic number, because the mean of its divisors is an integer number (3013070172).

Almost surely, 2^51561015060 is an apocalyptic number.

It is an amenable number.

51561015060 is an abundant number, since it is smaller than the sum of its proper divisors (93066353196).

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

51561015060 is a wasteful number, since it uses less digits than its factorization.

51561015060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526952 (or 1526950 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 51561015060 in words is "fifty-one billion, five hundred sixty-one million, fifteen thousand, sixty".