80139545 has 4 divisors (see below), whose sum is σ = 96167460. Its totient is φ = 64111632.

The previous prime is 80139533. The next prime is 80139569. The reversal of 80139545 is 54593108.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33953929 + 46185616 = 5827^2 + 6796^2 .

It is a cyclic number.

It is not a de Polignac number, because 80139545 - 2⁴ = 80139529 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8013950 + ... + 8013959.

It is an arithmetic number, because the mean of its divisors is an integer number (24041865).

Almost surely, 2^80139545 is an apocalyptic number.

It is an amenable number.

80139545 is a deficient number, since it is larger than the sum of its proper divisors (16027915).

80139545 is a wasteful number, since it uses less digits than its factorization.

80139545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16027914.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 80139545 is about 8952.0693138514. The cubic root of 80139545 is about 431.1373263016.

The spelling of 80139545 in words is "eighty million, one hundred thirty-nine thousand, five hundred forty-five".