13504400440531 has 24 divisors (see below), whose sum is σ = 18269144412512. Its totient is φ = 9713454854400.

The previous prime is 13504400440523. The next prime is 13504400440547.

13504400440531 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13504400440531 - 2³ = 13504400440523 is a prime.

It is a super-2 number, since 2×13504400440531² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13504400440331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 613212150 + ... + 613234171.

Almost surely, 2^{13504400440531} is an apocalyptic number.

13504400440531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13504400440531 is a deficient number, since it is larger than the sum of its proper divisors (4764743971981).

13504400440531 is a wasteful number, since it uses less digits than its factorization.

13504400440531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226446363 (or 1226446352 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

It can be divided in two parts, 13504400 and 440531, that added together give a palindrome (13944931).

The spelling of 13504400440531 in words is "thirteen trillion, five hundred four billion, four hundred million, four hundred forty thousand, five hundred thirty-one".