1255613236563 has 64 divisors (see below), whose sum is σ = 1935426355200. Its totient is φ = 709264200960.

The previous prime is 1255613236541. The next prime is 1255613236571. The reversal of 1255613236563 is 3656323165521.

It is not a de Polignac number, because 1255613236563 - 2⁹ = 1255613236051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1255613236513) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 494529348 + ... + 494531886.

It is an arithmetic number, because the mean of its divisors is an integer number (30241036800).

Almost surely, 2^{1255613236563} is an apocalyptic number.

1255613236563 is a deficient number, since it is larger than the sum of its proper divisors (679813118637).

1255613236563 is a wasteful number, since it uses less digits than its factorization.

1255613236563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472.

The product of its digits is 2916000, while the sum is 48.

The spelling of 1255613236563 in words is "one trillion, two hundred fifty-five billion, six hundred thirteen million, two hundred thirty-six thousand, five hundred sixty-three".