513944509280 has 48 divisors (see below), whose sum is σ = 1214353443744. Its totient is φ = 205550791680.

The previous prime is 513944509261. The next prime is 513944509297. The reversal of 513944509280 is 82905449315.

It is a super-2 number, since 2×513944509280² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1033325 + ... + 1447635.

It is an arithmetic number, because the mean of its divisors is an integer number (25299030078).

Almost surely, 2^513944509280 is an apocalyptic number.

It is an amenable number.

513944509280 is an abundant number, since it is smaller than the sum of its proper divisors (700408934464).

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

513944509280 is a wasteful number, since it uses less digits than its factorization.

513944509280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422079 (or 422071 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 513944509280 in words is "five hundred thirteen billion, nine hundred forty-four million, five hundred nine thousand, two hundred eighty".