51915831460 has 24 divisors (see below), whose sum is σ = 111969821880. Its totient is φ = 20205080064.

The previous prime is 51915831353. The next prime is 51915831479. The reversal of 51915831460 is 6413851915.

It can be written as a sum of positive squares in 4 ways, for example, as 9848180644 + 42067650816 = 99238^2 + 205104^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35077525 + ... + 35079004.

It is an arithmetic number, because the mean of its divisors is an integer number (4665409245).

Almost surely, 2^51915831460 is an apocalyptic number.

It is an amenable number.

51915831460 is an abundant number, since it is smaller than the sum of its proper divisors (60053990420).

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

51915831460 is a wasteful number, since it uses less digits than its factorization.

51915831460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70156575 (or 70156573 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 43.

The spelling of 51915831460 in words is "fifty-one billion, nine hundred fifteen million, eight hundred thirty-one thousand, four hundred sixty".