80649850 has 12 divisors (see below), whose sum is σ = 150008814. Its totient is φ = 32259920.

The previous prime is 80649839. The next prime is 80649857. The reversal of 80649850 is 5894608.

It can be written as a sum of positive squares in 3 ways, for example, as 31775769 + 48874081 = 5637^2 + 6991^2 .

It is not an unprimeable number, because it can be changed into a prime (80649857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 806449 + ... + 806548.

Almost surely, 2^80649850 is an apocalyptic number.

80649850 is a deficient number, since it is larger than the sum of its proper divisors (69358964).

80649850 is a wasteful number, since it uses less digits than its factorization.

80649850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1613009 (or 1613004 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 80649850 is about 8980.5261538509. The cubic root of 80649850 is about 432.0505092120.

The spelling of 80649850 in words is "eighty million, six hundred forty-nine thousand, eight hundred fifty".