80997587999 has 8 divisors (see below), whose sum is σ = 81695416320. Its totient is φ = 80302293496.

The previous prime is 80997587987. The next prime is 80997588043. The reversal of 80997587999 is 99978579908.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80997587999 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 (80997587929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569219 + ... + 697140.

It is an arithmetic number, because the mean of its divisors is an integer number (10211927040).

Almost surely, 2^80997587999 is an apocalyptic number.

80997587999 is a deficient number, since it is larger than the sum of its proper divisors (697828321).

80997587999 is a wasteful number, since it uses less digits than its factorization.

80997587999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266909.

The product of its (nonzero) digits is 925888320, while the sum is 80.

The spelling of 80997587999 in words is "eighty billion, nine hundred ninety-seven million, five hundred eighty-seven thousand, nine hundred ninety-nine".