13878780771 has 16 divisors (see below), whose sum is σ = 19193362848. Its totient is φ = 8913312000.

The previous prime is 13878780767. The next prime is 13878780779. The reversal of 13878780771 is 17708787831.

It is not a de Polignac number, because 13878780771 - 2² = 13878780767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13878780779) 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, 607770 + ... + 630191.

It is an arithmetic number, because the mean of its divisors is an integer number (1199585178).

Almost surely, 2^13878780771 is an apocalyptic number.

13878780771 is a deficient number, since it is larger than the sum of its proper divisors (5314582077).

13878780771 is a wasteful number, since it uses less digits than its factorization.

13878780771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238102.

The product of its (nonzero) digits is 3687936, while the sum is 57.

The spelling of 13878780771 in words is "thirteen billion, eight hundred seventy-eight million, seven hundred eighty thousand, seven hundred seventy-one".