80239029821 has 8 divisors (see below), whose sum is σ = 81853297344. Its totient is φ = 78640824960.

The previous prime is 80239029809. The next prime is 80239029839. The reversal of 80239029821 is 12892093208.

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

It is a cyclic number.

It is not a de Polignac number, because 80239029821 - 2¹⁰ = 80239028797 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 (80239029121) 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, 4005575 + ... + 4025556.

It is an arithmetic number, because the mean of its divisors is an integer number (10231662168).

Almost surely, 2^80239029821 is an apocalyptic number.

It is an amenable number.

80239029821 is a deficient number, since it is larger than the sum of its proper divisors (1614267523).

80239029821 is a wasteful number, since it uses less digits than its factorization.

80239029821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8031331.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 80239029821 in words is "eighty billion, two hundred thirty-nine million, twenty-nine thousand, eight hundred twenty-one".