80404645 has 8 divisors (see below), whose sum is σ = 102161304. Its totient is φ = 60539904.

The previous prime is 80404627. The next prime is 80404651. The reversal of 80404645 is 54640408.

It can be written as a sum of positive squares in 4 ways, for example, as 35688676 + 44715969 = 5974^2 + 6687^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80404645 - 2⁷ = 80404517 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 472884 + ... + 473053.

It is an arithmetic number, because the mean of its divisors is an integer number (12770163).

Almost surely, 2^80404645 is an apocalyptic number.

80404645 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

80404645 is a deficient number, since it is larger than the sum of its proper divisors (21756659).

80404645 is a wasteful number, since it uses less digits than its factorization.

80404645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945959.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 80404645 is about 8966.8637215026. The cubic root of 80404645 is about 431.6122009233.

The spelling of 80404645 in words is "eighty million, four hundred four thousand, six hundred forty-five".