80765661993 has 8 divisors (see below), whose sum is σ = 107697380448. Its totient is φ = 53838859104.

The previous prime is 80765661971. The next prime is 80765662009. The reversal of 80765661993 is 39916656708.

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

It is not a de Polignac number, because 80765661993 - 2⁹ = 80765661481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80765668993) 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, 1190380 + ... + 1256397.

It is an arithmetic number, because the mean of its divisors is an integer number (13462172556).

Almost surely, 2^80765661993 is an apocalyptic number.

It is an amenable number.

80765661993 is a deficient number, since it is larger than the sum of its proper divisors (26931718455).

80765661993 is a wasteful number, since it uses less digits than its factorization.

80765661993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457783.

The product of its (nonzero) digits is 14696640, while the sum is 60.

The spelling of 80765661993 in words is "eighty billion, seven hundred sixty-five million, six hundred sixty-one thousand, nine hundred ninety-three".