51538606860 has 96 divisors (see below), whose sum is σ = 160767714240. Its totient is φ = 12248957952.

The previous prime is 51538606843. The next prime is 51538606871. The reversal of 51538606860 is 6860683515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1116607 + ... + 1161846.

It is an arithmetic number, because the mean of its divisors is an integer number (1674663690).

Almost surely, 2^51538606860 is an apocalyptic number.

It is an amenable number.

51538606860 is an abundant number, since it is smaller than the sum of its proper divisors (109229107380).

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

51538606860 is a wasteful number, since it uses less digits than its factorization.

51538606860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278507 (or 2278505 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 51538606860 in words is "fifty-one billion, five hundred thirty-eight million, six hundred six thousand, eight hundred sixty".