15680648813 has 2 divisors, whose sum is σ = 15680648814. Its totient is φ = 15680648812.

The previous prime is 15680648791. The next prime is 15680648861. The reversal of 15680648813 is 31884608651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11993973289 + 3686675524 = 109517^2 + 60718^2 .

It is a cyclic number.

It is not a de Polignac number, because 15680648813 - 2¹⁰ = 15680647789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15680641813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7840324406 + 7840324407.

It is an arithmetic number, because the mean of its divisors is an integer number (7840324407).

Almost surely, 2^15680648813 is an apocalyptic number.

It is an amenable number.

15680648813 is a deficient number, since it is larger than the sum of its proper divisors (1).

15680648813 is an equidigital number, since it uses as much as digits as its factorization.

15680648813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1105920, while the sum is 50.

The spelling of 15680648813 in words is "fifteen billion, six hundred eighty million, six hundred forty-eight thousand, eight hundred thirteen".