80021506578 has 16 divisors (see below), whose sum is σ = 172354014336. Its totient is φ = 24622002000.

The previous prime is 80021506547. The next prime is 80021506601. The reversal of 80021506578 is 87560512008.

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, 512958298 + ... + 512958453.

It is an arithmetic number, because the mean of its divisors is an integer number (10772125896).

Almost surely, 2^80021506578 is an apocalyptic number.

80021506578 is an abundant number, since it is smaller than the sum of its proper divisors (92332507758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80021506578 is a wasteful number, since it uses less digits than its factorization.

80021506578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025916769.

The product of its (nonzero) digits is 134400, while the sum is 42.

The spelling of 80021506578 in words is "eighty billion, twenty-one million, five hundred six thousand, five hundred seventy-eight".