581280399560 has 128 divisors (see below), whose sum is σ = 1665943200000. Its totient is φ = 177700552704.

The previous prime is 581280399547. The next prime is 581280399571. The reversal of 581280399560 is 65993082185.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a junction number, because it is equal to n+sod(n) for n = 581280399496 and 581280399505.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3123185 + ... + 3304064.

It is an arithmetic number, because the mean of its divisors is an integer number (13015181250).

Almost surely, 2^581280399560 is an apocalyptic number.

It is an amenable number.

581280399560 is an abundant number, since it is smaller than the sum of its proper divisors (1084662800440).

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

581280399560 is a wasteful number, since it uses less digits than its factorization.

581280399560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6427303 (or 6427299 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 56.

The spelling of 581280399560 in words is "five hundred eighty-one billion, two hundred eighty million, three hundred ninety-nine thousand, five hundred sixty".