17972640885 has 16 divisors (see below), whose sum is σ = 28916879040. Its totient is φ = 9531857280.

The previous prime is 17972640883. The next prime is 17972640893. The reversal of 17972640885 is 58804627971.

It is not a de Polignac number, because 17972640885 - 2¹ = 17972640883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17972640883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3344176 + ... + 3349545.

It is an arithmetic number, because the mean of its divisors is an integer number (1807304940).

Almost surely, 2^17972640885 is an apocalyptic number.

17972640885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17972640885 is a deficient number, since it is larger than the sum of its proper divisors (10944238155).

17972640885 is a wasteful number, since it uses less digits than its factorization.

17972640885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6693908.

The product of its (nonzero) digits is 6773760, while the sum is 57.

The spelling of 17972640885 in words is "seventeen billion, nine hundred seventy-two million, six hundred forty thousand, eight hundred eighty-five".