80404145 has 16 divisors (see below), whose sum is σ = 99394320. Its totient is φ = 62394624.

The previous prime is 80404139. The next prime is 80404189. The reversal of 80404145 is 54140408.

It can be written as a sum of positive squares in 8 ways, for example, as 12967201 + 67436944 = 3601^2 + 8212^2 .

It is a cyclic number.

It is not a de Polignac number, because 80404145 - 2¹⁴ = 80387761 is a prime.

It is a super-3 number, since 3×80404145³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113051 + ... + 113759.

It is an arithmetic number, because the mean of its divisors is an integer number (6212145).

Almost surely, 2^80404145 is an apocalyptic number.

It is an amenable number.

80404145 is a deficient number, since it is larger than the sum of its proper divisors (18990175).

80404145 is a wasteful number, since it uses less digits than its factorization.

80404145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 80404145 is about 8966.8358410311. The cubic root of 80404145 is about 431.6113062546.

The spelling of 80404145 in words is "eighty million, four hundred four thousand, one hundred forty-five".