80641578 has 16 divisors (see below), whose sum is σ = 161673120. Its totient is φ = 26815536.

The previous prime is 80641577. The next prime is 80641601. The reversal of 80641578 is 87514608.

It is not an unprimeable number, because it can be changed into a prime (80641577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13525 + ... + 18552.

It is an arithmetic number, because the mean of its divisors is an integer number (10104570).

Almost surely, 2^80641578 is an apocalyptic number.

80641578 is an abundant number, since it is smaller than the sum of its proper divisors (81031542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80641578 is a wasteful number, since it uses less digits than its factorization.

80641578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32501.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 80641578 is about 8980.0655899609. The cubic root of 80641578 is about 432.0357373556.

The spelling of 80641578 in words is "eighty million, six hundred forty-one thousand, five hundred seventy-eight".