80617985 has 12 divisors (see below), whose sum is σ = 112536468. Its totient is φ = 55280736.

The previous prime is 80617981. The next prime is 80617987. The reversal of 80617985 is 58971608.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 47348161 + 33269824 = 6881^2 + 5768^2 .

It is not a de Polignac number, because 80617985 - 2² = 80617981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80617981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164282 + ... + 164771.

It is an arithmetic number, because the mean of its divisors is an integer number (9378039).

Almost surely, 2^80617985 is an apocalyptic number.

It is an amenable number.

80617985 is a deficient number, since it is larger than the sum of its proper divisors (31918483).

80617985 is a wasteful number, since it uses less digits than its factorization.

80617985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329072 (or 329065 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 80617985 is about 8978.7518620352. The cubic root of 80617985 is about 431.9936002281.

The spelling of 80617985 in words is "eighty million, six hundred seventeen thousand, nine hundred eighty-five".