17321040491 has 4 divisors (see below), whose sum is σ = 18074129232. Its totient is φ = 16567951752.

The previous prime is 17321040479. The next prime is 17321040493. The reversal of 17321040491 is 19404012371.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17321040491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17321040493) 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, 376544336 + ... + 376544381.

It is an arithmetic number, because the mean of its divisors is an integer number (4518532308).

Almost surely, 2^17321040491 is an apocalyptic number.

17321040491 is a deficient number, since it is larger than the sum of its proper divisors (753088741).

17321040491 is an equidigital number, since it uses as much as digits as its factorization.

17321040491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753088740.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 17321040491 in words is "seventeen billion, three hundred twenty-one million, forty thousand, four hundred ninety-one".