80829429221 has 4 divisors (see below), whose sum is σ = 80832377772. Its totient is φ = 80826480672.

The previous prime is 80829429199. The next prime is 80829429223. The reversal of 80829429221 is 12292492808.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43530232321 + 37299196900 = 208639^2 + 193130^2 .

It is a cyclic number.

It is not a de Polignac number, because 80829429221 - 2¹⁸ = 80829167077 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 (80829429223) 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, 1432766 + ... + 1488111.

It is an arithmetic number, because the mean of its divisors is an integer number (20208094443).

Almost surely, 2^80829429221 is an apocalyptic number.

It is an amenable number.

80829429221 is a deficient number, since it is larger than the sum of its proper divisors (2948551).

80829429221 is a wasteful number, since it uses less digits than its factorization.

80829429221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2948550.

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 80829429221 in words is "eighty billion, eight hundred twenty-nine million, four hundred twenty-nine thousand, two hundred twenty-one".