13778710771 has 24 divisors (see below), whose sum is σ = 16641293184. Its totient is φ = 11363063040.

The previous prime is 13778710727. The next prime is 13778710801. The reversal of 13778710771 is 17701787731.

It is not a de Polignac number, because 13778710771 - 2²⁹ = 13241839859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13778710711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236571 + ... + 289003.

It is an arithmetic number, because the mean of its divisors is an integer number (693387216).

Almost surely, 2^13778710771 is an apocalyptic number.

13778710771 is a deficient number, since it is larger than the sum of its proper divisors (2862582413).

13778710771 is a wasteful number, since it uses less digits than its factorization.

13778710771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52651 (or 52644 counting only the distinct ones).

The product of its (nonzero) digits is 403368, while the sum is 49.

The spelling of 13778710771 in words is "thirteen billion, seven hundred seventy-eight million, seven hundred ten thousand, seven hundred seventy-one".