80578045 has 16 divisors (see below), whose sum is σ = 105152688. Its totient is φ = 59028480.

The previous prime is 80578009. The next prime is 80578049. The reversal of 80578045 is 54087508.

It can be written as a sum of positive squares in 8 ways, for example, as 1350244 + 79227801 = 1162^2 + 8901^2 .

It is not a de Polignac number, because 80578045 - 2¹⁵ = 80545277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80577995 and 80578013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80578049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9666 + ... + 15955.

It is an arithmetic number, because the mean of its divisors is an integer number (6572043).

Almost surely, 2^80578045 is an apocalyptic number.

80578045 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

80578045 is a deficient number, since it is larger than the sum of its proper divisors (24574643).

80578045 is a wasteful number, since it uses less digits than its factorization.

80578045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25680.

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 80578045 is about 8976.5274466243. The cubic root of 80578045 is about 431.9222485957.

The spelling of 80578045 in words is "eighty million, five hundred seventy-eight thousand, forty-five".