80217656 has 16 divisors (see below), whose sum is σ = 152469600. Its totient is φ = 39559104.

The previous prime is 80217653. The next prime is 80217691. The reversal of 80217656 is 65671208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80217653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68096 + ... + 69263.

It is an arithmetic number, because the mean of its divisors is an integer number (9529350).

Almost surely, 2^80217656 is an apocalyptic number.

It is an amenable number.

80217656 is a deficient number, since it is larger than the sum of its proper divisors (72251944).

80217656 is a wasteful number, since it uses less digits than its factorization.

80217656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137438 (or 137434 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 80217656 is about 8956.4309856103. The cubic root of 80217656 is about 431.2773555146.

The spelling of 80217656 in words is "eighty million, two hundred seventeen thousand, six hundred fifty-six".