13778807768394 has 32 divisors (see below), whose sum is σ = 27636327014400. Its totient is φ = 4579828743600.

The previous prime is 13778807768393. The next prime is 13778807768423. The reversal of 13778807768394 is 49386770887731.

It is not an unprimeable number, because it can be changed into a prime (13778807768393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3414507 + ... + 6262305.

It is an arithmetic number, because the mean of its divisors is an integer number (863635219200).

Almost surely, 2^{13778807768394} is an apocalyptic number.

13778807768394 is an abundant number, since it is smaller than the sum of its proper divisors (13857519246006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13778807768394 is a wasteful number, since it uses less digits than its factorization.

13778807768394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850106.

The product of its (nonzero) digits is 2389782528, while the sum is 78.

The spelling of 13778807768394 in words is "thirteen trillion, seven hundred seventy-eight billion, eight hundred seven million, seven hundred sixty-eight thousand, three hundred ninety-four".