513138730806 has 64 divisors (see below), whose sum is σ = 1232803051200. Its totient is φ = 157274431488.

The previous prime is 513138730787. The next prime is 513138730831. The reversal of 513138730806 is 608037831315.

It is a super-2 number, since 2×513138730806² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1241701 + ... + 1602528.

It is an arithmetic number, because the mean of its divisors is an integer number (19262547675).

Almost surely, 2^513138730806 is an apocalyptic number.

513138730806 is an abundant number, since it is smaller than the sum of its proper divisors (719664320394).

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

513138730806 is a wasteful number, since it uses less digits than its factorization.

513138730806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844510 (or 2844504 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 513138730806 in words is "five hundred thirteen billion, one hundred thirty-eight million, seven hundred thirty thousand, eight hundred six".