80688932749 has 4 divisors (see below), whose sum is σ = 80702186080. Its totient is φ = 80675679420.

The previous prime is 80688932713. The next prime is 80688932759. The reversal of 80688932749 is 94723988608.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80688932749 - 2²⁹ = 80152061837 is a prime.

It is a super-3 number, since 3×80688932749³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80688932759) 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, 6617529 + ... + 6629710.

It is an arithmetic number, because the mean of its divisors is an integer number (20175546520).

Almost surely, 2^80688932749 is an apocalyptic number.

It is an amenable number.

80688932749 is a deficient number, since it is larger than the sum of its proper divisors (13253331).

80688932749 is a wasteful number, since it uses less digits than its factorization.

80688932749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13253330.

The product of its (nonzero) digits is 41803776, while the sum is 64.

The spelling of 80688932749 in words is "eighty billion, six hundred eighty-eight million, nine hundred thirty-two thousand, seven hundred forty-nine".