80421564 has 48 divisors (see below), whose sum is σ = 197406720. Its totient is φ = 25446720.

The previous prime is 80421563. The next prime is 80421569. The reversal of 80421564 is 46512408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80421563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17677 + ... + 21755.

It is an arithmetic number, because the mean of its divisors is an integer number (4112640).

Almost surely, 2^80421564 is an apocalyptic number.

It is an amenable number.

80421564 is an abundant number, since it is smaller than the sum of its proper divisors (116985156).

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

80421564 is a wasteful number, since it uses less digits than its factorization.

80421564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170 (or 4168 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 80421564 is about 8967.8070898074. The cubic root of 80421564 is about 431.6424725354.

The spelling of 80421564 in words is "eighty million, four hundred twenty-one thousand, five hundred sixty-four".