13778855760 has 80 divisors (see below), whose sum is σ = 42897950784. Its totient is φ = 3658576896.

The previous prime is 13778855749. The next prime is 13778855791. The reversal of 13778855760 is 6755887731.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 13778855760.

It is a congruent 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, 67282 + ... + 179121.

Almost surely, 2^13778855760 is an apocalyptic number.

13778855760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13778855760 is an abundant number, since it is smaller than the sum of its proper divisors (29119095024).

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

13778855760 is a wasteful number, since it uses less digits than its factorization.

13778855760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246652 (or 246646 counting only the distinct ones).

The product of its (nonzero) digits is 9878400, while the sum is 57.

The spelling of 13778855760 in words is "thirteen billion, seven hundred seventy-eight million, eight hundred fifty-five thousand, seven hundred sixty".