16231373989 has 2 divisors, whose sum is σ = 16231373990. Its totient is φ = 16231373988.

The previous prime is 16231373923. The next prime is 16231374007. The reversal of 16231373989 is 98937313261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14281445025 + 1949928964 = 119505^2 + 44158^2 .

It is a cyclic number.

It is not a de Polignac number, because 16231373989 - 2²¹ = 16229276837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16231377989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8115686994 + 8115686995.

It is an arithmetic number, because the mean of its divisors is an integer number (8115686995).

Almost surely, 2^16231373989 is an apocalyptic number.

It is an amenable number.

16231373989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16231373989 is an equidigital number, since it uses as much as digits as its factorization.

16231373989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 52.

The spelling of 16231373989 in words is "sixteen billion, two hundred thirty-one million, three hundred seventy-three thousand, nine hundred eighty-nine".