513171965980 has 36 divisors (see below), whose sum is σ = 1095617479320. Its totient is φ = 201903695040.

The previous prime is 513171965963. The next prime is 513171965987. The reversal of 513171965980 is 89569171315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513171965987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3373390 + ... + 3522229.

It is an arithmetic number, because the mean of its divisors is an integer number (30433818870).

Almost surely, 2^513171965980 is an apocalyptic number.

It is an amenable number.

513171965980 is an abundant number, since it is smaller than the sum of its proper divisors (582445513340).

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

513171965980 is a wasteful number, since it uses less digits than its factorization.

513171965980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6895750 (or 6895687 counting only the distinct ones).

The product of its (nonzero) digits is 2041200, while the sum is 55.

The spelling of 513171965980 in words is "five hundred thirteen billion, one hundred seventy-one million, nine hundred sixty-five thousand, nine hundred eighty".