80221018772 has 6 divisors (see below), whose sum is σ = 140386782858. Its totient is φ = 40110509384.

The previous prime is 80221018753. The next prime is 80221018781. The reversal of 80221018772 is 27781012208.

It can be written as a sum of positive squares in only one way, i.e., 65963703556 + 14257315216 = 256834^2 + 119404^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10027627343 + ... + 10027627350.

It is an arithmetic number, because the mean of its divisors is an integer number (23397797143).

Almost surely, 2^80221018772 is an apocalyptic number.

It is an amenable number.

80221018772 is a deficient number, since it is larger than the sum of its proper divisors (60165764086).

80221018772 is a wasteful number, since it uses less digits than its factorization.

80221018772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20055254697 (or 20055254695 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 38.

The spelling of 80221018772 in words is "eighty billion, two hundred twenty-one million, eighteen thousand, seven hundred seventy-two".