16042521589 has 2 divisors, whose sum is σ = 16042521590. Its totient is φ = 16042521588.

The previous prime is 16042521569. The next prime is 16042521601. The reversal of 16042521589 is 98512524061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16035916689 + 6604900 = 126633^2 + 2570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16042521589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16042521559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8021260794 + 8021260795.

It is an arithmetic number, because the mean of its divisors is an integer number (8021260795).

Almost surely, 2^16042521589 is an apocalyptic number.

It is an amenable number.

16042521589 is a deficient number, since it is larger than the sum of its proper divisors (1).

16042521589 is an equidigital number, since it uses as much as digits as its factorization.

16042521589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 16042521589 in words is "sixteen billion, forty-two million, five hundred twenty-one thousand, five hundred eighty-nine".