1255122643567 has 16 divisors (see below), whose sum is σ = 1365152600448. Its totient is φ = 1147020364800.

The previous prime is 1255122643543. The next prime is 1255122643571. The reversal of 1255122643567 is 7653462215521.

It is a cyclic number.

It is not a de Polignac number, because 1255122643567 - 2¹¹ = 1255122641519 is a prime.

It is a super-2 number, since 2×1255122643567² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1255122643567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255122643517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24807498 + ... + 24858040.

It is an arithmetic number, because the mean of its divisors is an integer number (85322037528).

Almost surely, 2^{1255122643567} is an apocalyptic number.

1255122643567 is a deficient number, since it is larger than the sum of its proper divisors (110029956881).

1255122643567 is a wasteful number, since it uses less digits than its factorization.

1255122643567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69570.

The product of its digits is 3024000, while the sum is 49.

The spelling of 1255122643567 in words is "one trillion, two hundred fifty-five billion, one hundred twenty-two million, six hundred forty-three thousand, five hundred sixty-seven".