13634842891 has 2 divisors, whose sum is σ = 13634842892. Its totient is φ = 13634842890.

The previous prime is 13634842853. The next prime is 13634842901. The reversal of 13634842891 is 19824843631.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13634842891 - 2²⁹ = 13097971979 is a prime.

It is not a weakly prime, because it can be changed into another prime (13634842831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6817421445 + 6817421446.

It is an arithmetic number, because the mean of its divisors is an integer number (6817421446).

Almost surely, 2^13634842891 is an apocalyptic number.

13634842891 is a deficient number, since it is larger than the sum of its proper divisors (1).

13634842891 is an equidigital number, since it uses as much as digits as its factorization.

13634842891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 49.

The spelling of 13634842891 in words is "thirteen billion, six hundred thirty-four million, eight hundred forty-two thousand, eight hundred ninety-one".