12744163531 has 32 divisors (see below), whose sum is σ = 14875660800. Its totient is φ = 10795680000.

The previous prime is 12744163511. The next prime is 12744163547. The reversal of 12744163531 is 13536144721.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12744163531 - 2⁵ = 12744163499 is a prime.

It is a super-2 number, since 2×12744163531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12744163511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8917525 + ... + 8918953.

It is an arithmetic number, because the mean of its divisors is an integer number (464864400).

Almost surely, 2^12744163531 is an apocalyptic number.

12744163531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12744163531 is a deficient number, since it is larger than the sum of its proper divisors (2131497269).

12744163531 is a wasteful number, since it uses less digits than its factorization.

12744163531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131.

The product of its digits is 60480, while the sum is 37.

The spelling of 12744163531 in words is "twelve billion, seven hundred forty-four million, one hundred sixty-three thousand, five hundred thirty-one".