15680978530669 has 2 divisors, whose sum is σ = 15680978530670. Its totient is φ = 15680978530668.

The previous prime is 15680978530667. The next prime is 15680978530687. The reversal of 15680978530669 is 96603587908651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14161335554025 + 1519642976644 = 3763155^2 + 1232738^2 .

It is an emirp because it is prime and its reverse (96603587908651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15680978530669 - 2¹ = 15680978530667 is a prime.

It is a super-2 number, since 2×15680978530669² (a number of 27 digits) contains 22 as substring.

Together with 15680978530667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15680978530667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7840489265334 + 7840489265335.

It is an arithmetic number, because the mean of its divisors is an integer number (7840489265335).

Almost surely, 2^{15680978530669} is an apocalyptic number.

It is an amenable number.

15680978530669 is a deficient number, since it is larger than the sum of its proper divisors (1).

15680978530669 is an equidigital number, since it uses as much as digits as its factorization.

15680978530669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 587865600, while the sum is 73.

The spelling of 15680978530669 in words is "fifteen trillion, six hundred eighty billion, nine hundred seventy-eight million, five hundred thirty thousand, six hundred sixty-nine".