13993539405 has 32 divisors (see below), whose sum is σ = 22560270336. Its totient is φ = 7406489664.

The previous prime is 13993539367. The next prime is 13993539437. The reversal of 13993539405 is 50493539931.

It is not a de Polignac number, because 13993539405 - 2⁷ = 13993539277 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1812784 + ... + 1820486.

It is an arithmetic number, because the mean of its divisors is an integer number (705008448).

Almost surely, 2^13993539405 is an apocalyptic number.

13993539405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13993539405 is a deficient number, since it is larger than the sum of its proper divisors (8566730931).

13993539405 is a wasteful number, since it uses less digits than its factorization.

13993539405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8617.

The product of its (nonzero) digits is 1968300, while the sum is 51.

The spelling of 13993539405 in words is "thirteen billion, nine hundred ninety-three million, five hundred thirty-nine thousand, four hundred five".