513979401634 has 32 divisors (see below), whose sum is σ = 781928349696. Its totient is φ = 253361500560.

The previous prime is 513979401629. The next prime is 513979401703. The reversal of 513979401634 is 436104979315.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43232839 + ... + 43244725.

It is an arithmetic number, because the mean of its divisors is an integer number (24435260928).

Almost surely, 2^513979401634 is an apocalyptic number.

513979401634 is a deficient number, since it is larger than the sum of its proper divisors (267948948062).

513979401634 is a wasteful number, since it uses less digits than its factorization.

513979401634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12910.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The spelling of 513979401634 in words is "five hundred thirteen billion, nine hundred seventy-nine million, four hundred one thousand, six hundred thirty-four".