581525868672 has 160 divisors (see below), whose sum is σ = 1977842032320. Its totient is φ = 166150227456.

The previous prime is 581525868667. The next prime is 581525868689. The reversal of 581525868672 is 276868525185.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3933748 + ... + 4078899.

It is an arithmetic number, because the mean of its divisors is an integer number (12361512702).

Almost surely, 2^581525868672 is an apocalyptic number.

It is an amenable number.

581525868672 is an abundant number, since it is smaller than the sum of its proper divisors (1396316163648).

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

581525868672 is an equidigital number, since it uses as much as digits as its factorization.

581525868672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8012680 (or 8012659 counting only the distinct ones).

The product of its digits is 64512000, while the sum is 63.

The spelling of 581525868672 in words is "five hundred eighty-one billion, five hundred twenty-five million, eight hundred sixty-eight thousand, six hundred seventy-two".