16231626689 has 2 divisors, whose sum is σ = 16231626690. Its totient is φ = 16231626688.

The previous prime is 16231626683. The next prime is 16231626737. The reversal of 16231626689 is 98662613261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13780881664 + 2450745025 = 117392^2 + 49505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16231626689 is a prime.

It is a super-3 number, since 3×16231626689³ (a number of 32 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16231626683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8115813344 + 8115813345.

It is an arithmetic number, because the mean of its divisors is an integer number (8115813345).

Almost surely, 2^16231626689 is an apocalyptic number.

It is an amenable number.

16231626689 is a deficient number, since it is larger than the sum of its proper divisors (1).

16231626689 is an equidigital number, since it uses as much as digits as its factorization.

16231626689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 50.

The spelling of 16231626689 in words is "sixteen billion, two hundred thirty-one million, six hundred twenty-six thousand, six hundred eighty-nine".