80646404 has 6 divisors (see below), whose sum is σ = 141131214. Its totient is φ = 40323200.

The previous prime is 80646403. The next prime is 80646427. The reversal of 80646404 is 40464608.

It can be written as a sum of positive squares in only one way, i.e., 44622400 + 36024004 = 6680^2 + 6002^2 .

It is not an unprimeable number, because it can be changed into a prime (80646403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10080797 + ... + 10080804.

It is an arithmetic number, because the mean of its divisors is an integer number (23521869).

Almost surely, 2^80646404 is an apocalyptic number.

It is an amenable number.

80646404 is a deficient number, since it is larger than the sum of its proper divisors (60484810).

80646404 is a wasteful number, since it uses less digits than its factorization.

80646404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20161605 (or 20161603 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 80646404 is about 8980.3342922187. The cubic root of 80646404 is about 432.0443555851.

The spelling of 80646404 in words is "eighty million, six hundred forty-six thousand, four hundred four".