581231147399 has 24 divisors (see below), whose sum is σ = 711769852800. Its totient is φ = 471938549040.

The previous prime is 581231147389. The next prime is 581231147423. The reversal of 581231147399 is 993741132185.

It is not a de Polignac number, because 581231147399 - 2³⁶ = 512511670663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 581231147399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581231147339) 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 23 ways as a sum of consecutive naturals, for example, 18819632 + ... + 18850490.

It is an arithmetic number, because the mean of its divisors is an integer number (29657077200).

Almost surely, 2^581231147399 is an apocalyptic number.

581231147399 is a deficient number, since it is larger than the sum of its proper divisors (130538705401).

581231147399 is a wasteful number, since it uses less digits than its factorization.

581231147399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51123 (or 51116 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 53.

The spelling of 581231147399 in words is "five hundred eighty-one billion, two hundred thirty-one million, one hundred forty-seven thousand, three hundred ninety-nine".