80649968 has 20 divisors (see below), whose sum is σ = 178582320. Its totient is φ = 34564224.

The previous prime is 80649929. The next prime is 80649997. The reversal of 80649968 is 86994608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359933 + ... + 360156.

It is an arithmetic number, because the mean of its divisors is an integer number (8929116).

Almost surely, 2^80649968 is an apocalyptic number.

It is an amenable number.

80649968 is an abundant number, since it is smaller than the sum of its proper divisors (97932352).

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

80649968 is a wasteful number, since it uses less digits than its factorization.

80649968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720104 (or 720098 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 80649968 is about 8980.5327236195. The cubic root of 80649968 is about 432.0507199251.

The spelling of 80649968 in words is "eighty million, six hundred forty-nine thousand, nine hundred sixty-eight".