13673780771 has 4 divisors (see below), whose sum is σ = 15627178032. Its totient is φ = 11720383512.

The previous prime is 13673780767. The next prime is 13673780777. The reversal of 13673780771 is 17708737631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13673780771 - 2² = 13673780767 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13673780777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976698620 + ... + 976698633.

It is an arithmetic number, because the mean of its divisors is an integer number (3906794508).

Almost surely, 2^13673780771 is an apocalyptic number.

13673780771 is a deficient number, since it is larger than the sum of its proper divisors (1953397261).

13673780771 is an equidigital number, since it uses as much as digits as its factorization.

13673780771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1953397260.

The product of its (nonzero) digits is 1037232, while the sum is 50.

The spelling of 13673780771 in words is "thirteen billion, six hundred seventy-three million, seven hundred eighty thousand, seven hundred seventy-one".