17980371065 has 8 divisors (see below), whose sum is σ = 21591552840. Its totient is φ = 14374225152.

The previous prime is 17980371053. The next prime is 17980371077. The reversal of 17980371065 is 56017308971.

It is an interprime number because it is at equal distance from previous prime (17980371053) and next prime (17980371077).

It can be written as a sum of positive squares in 4 ways, for example, as 738317584 + 17242053481 = 27172^2 + 131309^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 17980371065 - 2¹² = 17980366969 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1251104 + ... + 1265393.

It is an arithmetic number, because the mean of its divisors is an integer number (2698944105).

Almost surely, 2^17980371065 is an apocalyptic number.

It is an amenable number.

17980371065 is a deficient number, since it is larger than the sum of its proper divisors (3611181775).

17980371065 is a wasteful number, since it uses less digits than its factorization.

17980371065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2517931.

The product of its (nonzero) digits is 317520, while the sum is 47.

The spelling of 17980371065 in words is "seventeen billion, nine hundred eighty million, three hundred seventy-one thousand, sixty-five".