13405501521423 has 20 divisors (see below), whose sum is σ = 21846002480808. Its totient is φ = 8124546376080.

The previous prime is 13405501521397. The next prime is 13405501521427. The reversal of 13405501521423 is 32412510550431.

13405501521423 is a `hidden beast` number, since 1 + 3 + 4 + 0 + 5 + 501 + 5 + 2 + 142 + 3 = 666.

It is not a de Polignac number, because 13405501521423 - 2³⁰ = 13404427779599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13405501521427) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7522727236 + ... + 7522729017.

Almost surely, 2^{13405501521423} is an apocalyptic number.

13405501521423 is a deficient number, since it is larger than the sum of its proper divisors (8440500959385).

13405501521423 is a wasteful number, since it uses less digits than its factorization.

13405501521423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15045456276 (or 15045456267 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 13405501521423 in words is "thirteen trillion, four hundred five billion, five hundred one million, five hundred twenty-one thousand, four hundred twenty-three".