80819714921 has 4 divisors (see below), whose sum is σ = 88166961744. Its totient is φ = 73472468100.

The previous prime is 80819714869. The next prime is 80819714939. The reversal of 80819714921 is 12941791808.

It is a happy number.

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 80819714921 - 2¹⁴ = 80819698537 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80819714921.

It is not an unprimeable number, because it can be changed into a prime (80819714951) 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, 3673623395 + ... + 3673623416.

It is an arithmetic number, because the mean of its divisors is an integer number (22041740436).

Almost surely, 2^80819714921 is an apocalyptic number.

It is an amenable number.

80819714921 is a deficient number, since it is larger than the sum of its proper divisors (7347246823).

80819714921 is a wasteful number, since it uses less digits than its factorization.

80819714921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7347246822.

The product of its (nonzero) digits is 290304, while the sum is 50.

The spelling of 80819714921 in words is "eighty billion, eight hundred nineteen million, seven hundred fourteen thousand, nine hundred twenty-one".