516979923860 has 12 divisors (see below), whose sum is σ = 1085657840148. Its totient is φ = 206791969536.

The previous prime is 516979923841. The next prime is 516979923871. The reversal of 516979923860 is 68329979615.

It can be written as a sum of positive squares in 2 ways, for example, as 258198129424 + 258781794436 = 508132^2 + 508706^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12924498077 + ... + 12924498116.

It is an arithmetic number, because the mean of its divisors is an integer number (90471486679).

Almost surely, 2^516979923860 is an apocalyptic number.

It is an amenable number.

516979923860 is an abundant number, since it is smaller than the sum of its proper divisors (568677916288).

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

516979923860 is a wasteful number, since it uses less digits than its factorization.

516979923860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25848996202 (or 25848996200 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 65.

The spelling of 516979923860 in words is "five hundred sixteen billion, nine hundred seventy-nine million, nine hundred twenty-three thousand, eight hundred sixty".