51615035860 has 36 divisors (see below), whose sum is σ = 115142620572. Its totient is φ = 19431540736.

The previous prime is 51615035837. The next prime is 51615035861. The reversal of 51615035860 is 6853051615.

51615035860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 1498154436 + 50116881424 = 38706^2 + 223868^2 .

It is a super-2 number, since 2×51615035860² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51615035861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4459189 + ... + 4470748.

It is an arithmetic number, because the mean of its divisors is an integer number (3198406127).

Almost surely, 2^51615035860 is an apocalyptic number.

It is an amenable number.

51615035860 is an abundant number, since it is smaller than the sum of its proper divisors (63527584712).

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

51615035860 is a wasteful number, since it uses less digits than its factorization.

51615035860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8929980 (or 8929961 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 51615035860 in words is "fifty-one billion, six hundred fifteen million, thirty-five thousand, eight hundred sixty".