13605154431 has 32 divisors (see below), whose sum is σ = 20207086848. Its totient is φ = 8072163840.

The previous prime is 13605154397. The next prime is 13605154487. The reversal of 13605154431 is 13445150631.

It is a happy number.

It is not a de Polignac number, because 13605154431 - 2¹⁴ = 13605138047 is a prime.

It is a super-2 number, since 2×13605154431² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 13605154392 and 13605154401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13605154631) 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, 808455 + ... + 825111.

It is an arithmetic number, because the mean of its divisors is an integer number (631471464).

Almost surely, 2^13605154431 is an apocalyptic number.

13605154431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13605154431 is a deficient number, since it is larger than the sum of its proper divisors (6601932417).

13605154431 is a wasteful number, since it uses less digits than its factorization.

13605154431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17191.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 13605154431 in words is "thirteen billion, six hundred five million, one hundred fifty-four thousand, four hundred thirty-one".