17179972065 has 12 divisors (see below), whose sum is σ = 29778618324. Its totient is φ = 9162651744.

The previous prime is 17179972049. The next prime is 17179972067. The reversal of 17179972065 is 56027997171.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2078265744 + 15101706321 = 45588^2 + 122889^2 .

It is not a de Polignac number, because 17179972065 - 2⁴ = 17179972049 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (17179972067) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190888534 + ... + 190888623.

It is an arithmetic number, because the mean of its divisors is an integer number (2481551527).

Almost surely, 2^17179972065 is an apocalyptic number.

17179972065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17179972065 is a deficient number, since it is larger than the sum of its proper divisors (12598646259).

17179972065 is a wasteful number, since it uses less digits than its factorization.

17179972065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381777168 (or 381777165 counting only the distinct ones).

The product of its (nonzero) digits is 1666980, while the sum is 54.

The spelling of 17179972065 in words is "seventeen billion, one hundred seventy-nine million, nine hundred seventy-two thousand, sixty-five".