15680978530667 has 2 divisors, whose sum is σ = 15680978530668. Its totient is φ = 15680978530666.

The previous prime is 15680978530577. The next prime is 15680978530669. The reversal of 15680978530667 is 76603587908651.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15680978530667 - 2³² = 15676683563371 is a prime.

Together with 15680978530669, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15680978530667.

It is not a weakly prime, because it can be changed into another prime (15680978530669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7840489265333 + 7840489265334.

It is an arithmetic number, because the mean of its divisors is an integer number (7840489265334).

Almost surely, 2^{15680978530667} is an apocalyptic number.

15680978530667 is a deficient number, since it is larger than the sum of its proper divisors (1).

15680978530667 is an equidigital number, since it uses as much as digits as its factorization.

15680978530667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 457228800, while the sum is 71.

The spelling of 15680978530667 in words is "fifteen trillion, six hundred eighty billion, nine hundred seventy-eight million, five hundred thirty thousand, six hundred sixty-seven".