16980297617 has 4 divisors (see below), whose sum is σ = 17184879600. Its totient is φ = 16775715636.

The previous prime is 16980297613. The next prime is 16980297661. The reversal of 16980297617 is 71679208961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16980297617 - 2² = 16980297613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16980297611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102290867 + ... + 102291032.

It is an arithmetic number, because the mean of its divisors is an integer number (4296219900).

Almost surely, 2^16980297617 is an apocalyptic number.

It is an amenable number.

16980297617 is a deficient number, since it is larger than the sum of its proper divisors (204581983).

16980297617 is an equidigital number, since it uses as much as digits as its factorization.

16980297617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204581982.

The product of its (nonzero) digits is 2286144, while the sum is 56.

The spelling of 16980297617 in words is "sixteen billion, nine hundred eighty million, two hundred ninety-seven thousand, six hundred seventeen".