51860117828 has 12 divisors (see below), whose sum is σ = 91256617452. Its totient is φ = 25786798560.

The previous prime is 51860117821. The next prime is 51860117831. The reversal of 51860117828 is 82871106815.

It can be written as a sum of positive squares in 2 ways, for example, as 1123456324 + 50736661504 = 33518^2 + 225248^2 .

It is a super-2 number, since 2×51860117828² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51860117821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35814275 + ... + 35815722.

It is an arithmetic number, because the mean of its divisors is an integer number (7604718121).

Almost surely, 2^51860117828 is an apocalyptic number.

It is an amenable number.

51860117828 is a deficient number, since it is larger than the sum of its proper divisors (39396499624).

51860117828 is a wasteful number, since it uses less digits than its factorization.

51860117828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71630182 (or 71630180 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 47.

The spelling of 51860117828 in words is "fifty-one billion, eight hundred sixty million, one hundred seventeen thousand, eight hundred twenty-eight".