1255122643566 has 32 divisors (see below), whose sum is σ = 2741659901568. Its totient is φ = 379894292640.

The previous prime is 1255122643543. The next prime is 1255122643571. The reversal of 1255122643566 is 6653462215521.

It is a congruent number.

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, 11090836 + ... + 11203431.

It is an arithmetic number, because the mean of its divisors is an integer number (85676871924).

Almost surely, 2^{1255122643566} is an apocalyptic number.

1255122643566 is an abundant number, since it is smaller than the sum of its proper divisors (1486537258002).

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

1255122643566 is a wasteful number, since it uses less digits than its factorization.

1255122643566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22295136.

The product of its digits is 2592000, while the sum is 48.

The spelling of 1255122643566 in words is "one trillion, two hundred fifty-five billion, one hundred twenty-two million, six hundred forty-three thousand, five hundred sixty-six".