13905640445 has 8 divisors (see below), whose sum is σ = 16834439736. Its totient is φ = 11026064896.

The previous prime is 13905640421. The next prime is 13905640451. The reversal of 13905640445 is 54404650931.

It can be written as a sum of positive squares in 4 ways, for example, as 5466244 + 13900174201 = 2338^2 + 117899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13905640445 - 2⁶ = 13905640381 is a prime.

It is a super-3 number, since 3×13905640445³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12305312 + ... + 12306441.

It is an arithmetic number, because the mean of its divisors is an integer number (2104304967).

Almost surely, 2^13905640445 is an apocalyptic number.

It is an amenable number.

13905640445 is a deficient number, since it is larger than the sum of its proper divisors (2928799291).

13905640445 is a wasteful number, since it uses less digits than its factorization.

13905640445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24611871.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 13905640445 in words is "thirteen billion, nine hundred five million, six hundred forty thousand, four hundred forty-five".