13645534401 has 64 divisors (see below), whose sum is σ = 21326976000. Its totient is φ = 8611142400.

The previous prime is 13645534373. The next prime is 13645534411. The reversal of 13645534401 is 10443554631.

13645534401 is a `hidden beast` number, since 1 + 3 + 64 + 553 + 4 + 40 + 1 = 666.

It is not a de Polignac number, because 13645534401 - 2²⁹ = 13108663489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13645534411) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8619256 + ... + 8620838.

It is an arithmetic number, because the mean of its divisors is an integer number (333234000).

Almost surely, 2^13645534401 is an apocalyptic number.

It is an amenable number.

13645534401 is a deficient number, since it is larger than the sum of its proper divisors (7681441599).

13645534401 is a wasteful number, since it uses less digits than its factorization.

13645534401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831 (or 1825 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 13645534401 in words is "thirteen billion, six hundred forty-five million, five hundred thirty-four thousand, four hundred one".