15320157689 has 2 divisors, whose sum is σ = 15320157690. Its totient is φ = 15320157688.

The previous prime is 15320157659. The next prime is 15320157707. The reversal of 15320157689 is 98675102351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8902866025 + 6417291664 = 94355^2 + 80108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15320157689 is a prime.

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 (15320157649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7660078844 + 7660078845.

It is an arithmetic number, because the mean of its divisors is an integer number (7660078845).

Almost surely, 2^15320157689 is an apocalyptic number.

It is an amenable number.

15320157689 is a deficient number, since it is larger than the sum of its proper divisors (1).

15320157689 is an equidigital number, since it uses as much as digits as its factorization.

15320157689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 15320157689 in words is "fifteen billion, three hundred twenty million, one hundred fifty-seven thousand, six hundred eighty-nine".