13999904901 has 6 divisors (see below), whose sum is σ = 20222084870. Its totient is φ = 9333269928.

The previous prime is 13999904851. The next prime is 13999904903. The reversal of 13999904901 is 10940999931.

It can be written as a sum of positive squares in only one way, i.e., 12367664100 + 1632240801 = 111210^2 + 40401^2 .

It is not a de Polignac number, because 13999904901 - 2⁶ = 13999904837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13999904903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 777772486 + ... + 777772503.

Almost surely, 2^13999904901 is an apocalyptic number.

It is an amenable number.

13999904901 is a deficient number, since it is larger than the sum of its proper divisors (6222179969).

13999904901 is a wasteful number, since it uses less digits than its factorization.

13999904901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555544995 (or 1555544992 counting only the distinct ones).

The product of its (nonzero) digits is 708588, while the sum is 54.

The spelling of 13999904901 in words is "thirteen billion, nine hundred ninety-nine million, nine hundred four thousand, nine hundred one".