581781460516 has 9 divisors (see below), whose sum is σ = 1018120225521. Its totient is φ = 290889967512.

The previous prime is 581781460493. The next prime is 581781460523. The reversal of 581781460516 is 615064187185.

The square root of 581781460516 is 762746.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 439423152100 + 142358308416 = 662890^2 + 377304^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1334806 + ... + 1716178.

Almost surely, 2^581781460516 is an apocalyptic number.

581781460516 is the 762746-th square number.

It is an amenable number.

581781460516 is a deficient number, since it is larger than the sum of its proper divisors (436338765005).

581781460516 is an frugal number, since it uses more digits than its factorization.

581781460516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762750 (or 381375 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 52.

The spelling of 581781460516 in words is "five hundred eighty-one billion, seven hundred eighty-one million, four hundred sixty thousand, five hundred sixteen".