80817221042 has 16 divisors (see below), whose sum is σ = 123952208640. Its totient is φ = 39509750592.

The previous prime is 80817221033. The next prime is 80817221071. The reversal of 80817221042 is 24012271808.

It is a junction number, because it is equal to n+sod(n) for n = 80817220993 and 80817221011.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2466743 + ... + 2499290.

It is an arithmetic number, because the mean of its divisors is an integer number (7747013040).

Almost surely, 2^80817221042 is an apocalyptic number.

80817221042 is a deficient number, since it is larger than the sum of its proper divisors (43134987598).

80817221042 is a wasteful number, since it uses less digits than its factorization.

80817221042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4966217.

The product of its (nonzero) digits is 14336, while the sum is 35.

The spelling of 80817221042 in words is "eighty billion, eight hundred seventeen million, two hundred twenty-one thousand, forty-two".