13475811857431 has 80 divisors (see below), whose sum is σ = 18165569099040. Its totient is φ = 9879285104640.

The previous prime is 13475811857423. The next prime is 13475811857509.

13475811857431 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13475811857431 - 2³ = 13475811857423 is a prime.

It is a super-2 number, since 2×13475811857431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13475811857231) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2063989975 + ... + 2063996503.

It is an arithmetic number, because the mean of its divisors is an integer number (227069613738).

Almost surely, 2^{13475811857431} is an apocalyptic number.

13475811857431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13475811857431 is a deficient number, since it is larger than the sum of its proper divisors (4689757241609).

13475811857431 is an equidigital number, since it uses as much as digits as its factorization.

13475811857431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11182 (or 11161 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 58.

The spelling of 13475811857431 in words is "thirteen trillion, four hundred seventy-five billion, eight hundred eleven million, eight hundred fifty-seven thousand, four hundred thirty-one".