80820817402 has 32 divisors (see below), whose sum is σ = 139415431680. Its totient is φ = 34853837760.

The previous prime is 80820817333. The next prime is 80820817423. The reversal of 80820817402 is 20471802808.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1705488 + ... + 1752235.

It is an arithmetic number, because the mean of its divisors is an integer number (4356732240).

Almost surely, 2^80820817402 is an apocalyptic number.

80820817402 is a deficient number, since it is larger than the sum of its proper divisors (58594614278).

80820817402 is a wasteful number, since it uses less digits than its factorization.

80820817402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457798.

The product of its (nonzero) digits is 57344, while the sum is 40.

The spelling of 80820817402 in words is "eighty billion, eight hundred twenty million, eight hundred seventeen thousand, four hundred two".