516138427994 has 32 divisors (see below), whose sum is σ = 903357100800. Its totient is φ = 221081877744.

The previous prime is 516138427993. The next prime is 516138428033. The reversal of 516138427994 is 499724831615.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (516138427993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1063364 + ... + 1470720.

It is an arithmetic number, because the mean of its divisors is an integer number (28229909400).

Almost surely, 2^516138427994 is an apocalyptic number.

516138427994 is a deficient number, since it is larger than the sum of its proper divisors (387218672806).

516138427994 is a wasteful number, since it uses less digits than its factorization.

516138427994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409227 (or 409213 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 59.

The spelling of 516138427994 in words is "five hundred sixteen billion, one hundred thirty-eight million, four hundred twenty-seven thousand, nine hundred ninety-four".