80021577771020 has 24 divisors (see below), whose sum is σ = 173466129879168. Its totient is φ = 30976094620800.

The previous prime is 80021577770971. The next prime is 80021577771049. The reversal of 80021577771020 is 2017777512008.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64533529841 + ... + 64533531080.

It is an arithmetic number, because the mean of its divisors is an integer number (7227755411632).

Almost surely, 2^{80021577771020} is an apocalyptic number.

It is an amenable number.

80021577771020 is an abundant number, since it is smaller than the sum of its proper divisors (93444552108148).

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

80021577771020 is a wasteful number, since it uses less digits than its factorization.

80021577771020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129067060961 (or 129067060959 counting only the distinct ones).

The product of its (nonzero) digits is 384160, while the sum is 47.

The spelling of 80021577771020 in words is "eighty trillion, twenty-one billion, five hundred seventy-seven million, seven hundred seventy-one thousand, twenty".