1255365531664 has 80 divisors (see below), whose sum is σ = 2557123208640. Its totient is φ = 596352798720.

The previous prime is 1255365531649. The next prime is 1255365531683. The reversal of 1255365531664 is 4661355635521.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9440067 + ... + 9572125.

It is an arithmetic number, because the mean of its divisors is an integer number (31964040108).

Almost surely, 2^{1255365531664} is an apocalyptic number.

It is an amenable number.

1255365531664 is an abundant number, since it is smaller than the sum of its proper divisors (1301757676976).

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

1255365531664 is a wasteful number, since it uses less digits than its factorization.

1255365531664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132488 (or 132482 counting only the distinct ones).

The product of its digits is 9720000, while the sum is 52.

The spelling of 1255365531664 in words is "one trillion, two hundred fifty-five billion, three hundred sixty-five million, five hundred thirty-one thousand, six hundred sixty-four".