513838863791 has 32 divisors (see below), whose sum is σ = 578758314240. Its totient is φ = 452208556800.

The previous prime is 513838863787. The next prime is 513838863821. The reversal of 513838863791 is 197368838315.

It is not a de Polignac number, because 513838863791 - 2² = 513838863787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513838860791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57945140 + ... + 57954006.

It is an arithmetic number, because the mean of its divisors is an integer number (18086197320).

Almost surely, 2^513838863791 is an apocalyptic number.

513838863791 is a deficient number, since it is larger than the sum of its proper divisors (64919450449).

513838863791 is a wasteful number, since it uses less digits than its factorization.

513838863791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10295.

The product of its digits is 26127360, while the sum is 62.

The spelling of 513838863791 in words is "five hundred thirteen billion, eight hundred thirty-eight million, eight hundred sixty-three thousand, seven hundred ninety-one".