15680827217 has 16 divisors (see below), whose sum is σ = 18602151552. Its totient is φ = 13054129920.

The previous prime is 15680827181. The next prime is 15680827297. The reversal of 15680827217 is 71272808651.

It is a cyclic number.

It is not a de Polignac number, because 15680827217 - 2⁸ = 15680826961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15680827297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1126253 + ... + 1140090.

It is an arithmetic number, because the mean of its divisors is an integer number (1162634472).

Almost surely, 2^15680827217 is an apocalyptic number.

15680827217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

15680827217 is a deficient number, since it is larger than the sum of its proper divisors (2921324335).

15680827217 is a wasteful number, since it uses less digits than its factorization.

15680827217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266408.

The product of its (nonzero) digits is 376320, while the sum is 47.

The spelling of 15680827217 in words is "fifteen billion, six hundred eighty million, eight hundred twenty-seven thousand, two hundred seventeen".