13902972505 has 32 divisors (see below), whose sum is σ = 18283507200. Its totient is φ = 10108530432.

The previous prime is 13902972497. The next prime is 13902972509. The reversal of 13902972505 is 50527920931.

It is a cyclic number.

It is not a de Polignac number, because 13902972505 - 2³ = 13902972497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13902972509) 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, 416464 + ... + 448606.

It is an arithmetic number, because the mean of its divisors is an integer number (571359600).

Almost surely, 2^13902972505 is an apocalyptic number.

It is an amenable number.

13902972505 is a deficient number, since it is larger than the sum of its proper divisors (4380534695).

13902972505 is a wasteful number, since it uses less digits than its factorization.

13902972505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32353.

The product of its (nonzero) digits is 170100, while the sum is 43.

The spelling of 13902972505 in words is "thirteen billion, nine hundred two million, nine hundred seventy-two thousand, five hundred five".