80243649 has 8 divisors (see below), whose sum is σ = 118879520. Its totient is φ = 53495748.

The previous prime is 80243641. The next prime is 80243659. The reversal of 80243649 is 94634208.

It is a happy number.

80243649 is a `hidden beast` number, since 8 + 0 + 2 + 4 + 3 + 649 = 666.

It is not a de Polignac number, because 80243649 - 2³ = 80243641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80243641) 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, 1485967 + ... + 1486020.

It is an arithmetic number, because the mean of its divisors is an integer number (14859940).

Almost surely, 2^80243649 is an apocalyptic number.

It is an amenable number.

80243649 is a deficient number, since it is larger than the sum of its proper divisors (38635871).

80243649 is a wasteful number, since it uses less digits than its factorization.

80243649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971996 (or 2971990 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 80243649 is about 8957.8819483179. The cubic root of 80243649 is about 431.3239328820.

The spelling of 80243649 in words is "eighty million, two hundred forty-three thousand, six hundred forty-nine".