13965408785 has 16 divisors (see below), whose sum is σ = 17650474560. Its totient is φ = 10578335040.

The previous prime is 13965408763. The next prime is 13965408791. The reversal of 13965408785 is 58780456931.

It is not a de Polignac number, because 13965408785 - 2⁸ = 13965408529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13965408785.

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, 131459 + ... + 212631.

It is an arithmetic number, because the mean of its divisors is an integer number (1103154660).

Almost surely, 2^13965408785 is an apocalyptic number.

It is an amenable number.

13965408785 is a deficient number, since it is larger than the sum of its proper divisors (3685065775).

13965408785 is a wasteful number, since it uses less digits than its factorization.

13965408785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83008.

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 13965408785 in words is "thirteen billion, nine hundred sixty-five million, four hundred eight thousand, seven hundred eighty-five".