13638870771 has 32 divisors (see below), whose sum is σ = 18544438080. Its totient is φ = 8915073024.

The previous prime is 13638870769. The next prime is 13638870799. The reversal of 13638870771 is 17707883631.

It is a happy number.

It is not a de Polignac number, because 13638870771 - 2¹ = 13638870769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13638370771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24486025 + ... + 24486581.

It is an arithmetic number, because the mean of its divisors is an integer number (579513690).

Almost surely, 2^13638870771 is an apocalyptic number.

13638870771 is a deficient number, since it is larger than the sum of its proper divisors (4905567309).

13638870771 is a wasteful number, since it uses less digits than its factorization.

13638870771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255.

The product of its (nonzero) digits is 1185408, while the sum is 51.

The spelling of 13638870771 in words is "thirteen billion, six hundred thirty-eight million, eight hundred seventy thousand, seven hundred seventy-one".