581323580931 has 16 divisors (see below), whose sum is σ = 779921800704. Its totient is φ = 385137625824.

The previous prime is 581323580839. The next prime is 581323580947. The reversal of 581323580931 is 139085323185.

It is not a de Polignac number, because 581323580931 - 2¹⁷ = 581323449859 is a prime.

It is a super-2 number, since 2×581323580931² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (581323580951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6314725 + ... + 6406121.

It is an arithmetic number, because the mean of its divisors is an integer number (48745112544).

Almost surely, 2^581323580931 is an apocalyptic number.

581323580931 is a deficient number, since it is larger than the sum of its proper divisors (198598219773).

581323580931 is a wasteful number, since it uses less digits than its factorization.

581323580931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104570.

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 581323580931 in words is "five hundred eighty-one billion, three hundred twenty-three million, five hundred eighty thousand, nine hundred thirty-one".