16261372789 has 2 divisors, whose sum is σ = 16261372790. Its totient is φ = 16261372788.

The previous prime is 16261372769. The next prime is 16261372801. The reversal of 16261372789 is 98727316261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13417283889 + 2844088900 = 115833^2 + 53330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16261372789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16261372769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8130686394 + 8130686395.

It is an arithmetic number, because the mean of its divisors is an integer number (8130686395).

Almost surely, 2^16261372789 is an apocalyptic number.

It is an amenable number.

16261372789 is a deficient number, since it is larger than the sum of its proper divisors (1).

16261372789 is an equidigital number, since it uses as much as digits as its factorization.

16261372789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 52.

The spelling of 16261372789 in words is "sixteen billion, two hundred sixty-one million, three hundred seventy-two thousand, seven hundred eighty-nine".