1253318679681 has 16 divisors (see below), whose sum is σ = 1675096771200. Its totient is φ = 833545215360.

The previous prime is 1253318679659. The next prime is 1253318679713. The reversal of 1253318679681 is 1869768133521.

It is not a de Polignac number, because 1253318679681 - 2¹⁷ = 1253318548609 is a prime.

It is a super-2 number, since 2×1253318679681² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1253318679601) 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, 2229141 + ... + 2734173.

It is an arithmetic number, because the mean of its divisors is an integer number (104693548200).

Almost surely, 2^{1253318679681} is an apocalyptic number.

It is an amenable number.

1253318679681 is a deficient number, since it is larger than the sum of its proper divisors (421778091519).

1253318679681 is a wasteful number, since it uses less digits than its factorization.

1253318679681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507016.

The product of its digits is 13063680, while the sum is 60.

The spelling of 1253318679681 in words is "one trillion, two hundred fifty-three billion, three hundred eighteen million, six hundred seventy-nine thousand, six hundred eighty-one".