15680889625321 has 2 divisors, whose sum is σ = 15680889625322. Its totient is φ = 15680889625320.

The previous prime is 15680889625277. The next prime is 15680889625327. The reversal of 15680889625321 is 12352698808651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12262680279721 + 3418209345600 = 3501811^2 + 1848840^2 .

It is a cyclic number.

It is not a de Polignac number, because 15680889625321 - 2²¹ = 15680887528169 is a prime.

It is not a weakly prime, because it can be changed into another prime (15680889625327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7840444812660 + 7840444812661.

It is an arithmetic number, because the mean of its divisors is an integer number (7840444812661).

Almost surely, 2^{15680889625321} is an apocalyptic number.

It is an amenable number.

15680889625321 is a deficient number, since it is larger than the sum of its proper divisors (1).

15680889625321 is an equidigital number, since it uses as much as digits as its factorization.

15680889625321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49766400, while the sum is 64.

The spelling of 15680889625321 in words is "fifteen trillion, six hundred eighty billion, eight hundred eighty-nine million, six hundred twenty-five thousand, three hundred twenty-one".