80649638 has 16 divisors (see below), whose sum is σ = 130589280. Its totient is φ = 37240896.

The previous prime is 80649619. The next prime is 80649641. The reversal of 80649638 is 83694608.

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, 28895 + ... + 31562.

It is an arithmetic number, because the mean of its divisors is an integer number (8161830).

Almost surely, 2^80649638 is an apocalyptic number.

80649638 is a deficient number, since it is larger than the sum of its proper divisors (49939642).

80649638 is a wasteful number, since it uses less digits than its factorization.

80649638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60511.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 80649638 is about 8980.5143505258. The cubic root of 80649638 is about 432.0501306422.

The spelling of 80649638 in words is "eighty million, six hundred forty-nine thousand, six hundred thirty-eight".