13906989785 has 16 divisors (see below), whose sum is σ = 18010965504. Its totient is φ = 10247573952.

The previous prime is 13906989743. The next prime is 13906989823. The reversal of 13906989785 is 58798960931.

It is a cyclic number.

It is not a de Polignac number, because 13906989785 - 2⁸ = 13906989529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200957 + ... + 261146.

It is an arithmetic number, because the mean of its divisors is an integer number (1125685344).

Almost surely, 2^13906989785 is an apocalyptic number.

It is an amenable number.

13906989785 is a deficient number, since it is larger than the sum of its proper divisors (4103975719).

13906989785 is a wasteful number, since it uses less digits than its factorization.

13906989785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462584.

The product of its (nonzero) digits is 29393280, while the sum is 65.

The spelling of 13906989785 in words is "thirteen billion, nine hundred six million, nine hundred eighty-nine thousand, seven hundred eighty-five".