581660952889 has 3 divisors (see below), whose sum is σ = 581661715557. Its totient is φ = 581660190222.

The previous prime is 581660952863. The next prime is 581660952911. The reversal of 581660952889 is 988259066185.

The square root of 581660952889 is 762667.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 988259066185 = 5 ⋅197651813237.

It is not a de Polignac number, because 581660952889 - 2⁵ = 581660952857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (581660952689) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 381334 + ... + 1144000.

It is an arithmetic number, because the mean of its divisors is an integer number (193887238519).

Almost surely, 2^581660952889 is an apocalyptic number.

581660952889 is the 762667-th square number.

581660952889 is the 381334-th centered octagonal number.

It is an amenable number.

581660952889 is a deficient number, since it is larger than the sum of its proper divisors (762668).

581660952889 is an frugal number, since it uses more digits than its factorization.

581660952889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525334 (or 762667 counting only the distinct ones).

The product of its (nonzero) digits is 74649600, while the sum is 67.

The spelling of 581660952889 in words is "five hundred eighty-one billion, six hundred sixty million, nine hundred fifty-two thousand, eight hundred eighty-nine".