17520799679 has 4 divisors (see below), whose sum is σ = 17554300776. Its totient is φ = 17487298584.

The previous prime is 17520799663. The next prime is 17520799711. The reversal of 17520799679 is 97699702571.

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

It is a cyclic number.

It is not a de Polignac number, because 17520799679 - 2⁴ = 17520799663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17520799609) 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, 16749764 + ... + 16750809.

It is an arithmetic number, because the mean of its divisors is an integer number (4388575194).

Almost surely, 2^17520799679 is an apocalyptic number.

17520799679 is a deficient number, since it is larger than the sum of its proper divisors (33501097).

17520799679 is an equidigital number, since it uses as much as digits as its factorization.

17520799679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33501096.

The product of its (nonzero) digits is 15002820, while the sum is 62.

The spelling of 17520799679 in words is "seventeen billion, five hundred twenty million, seven hundred ninety-nine thousand, six hundred seventy-nine".