80197865 has 16 divisors (see below), whose sum is σ = 105247296. Its totient is φ = 58180800.

The previous prime is 80197853. The next prime is 80197867. The reversal of 80197865 is 56879108.

It is a happy number.

It is not a de Polignac number, because 80197865 - 2⁶ = 80197801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80197867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23774 + ... + 26936.

It is an arithmetic number, because the mean of its divisors is an integer number (6577956).

Almost surely, 2^80197865 is an apocalyptic number.

It is an amenable number.

80197865 is a deficient number, since it is larger than the sum of its proper divisors (25049431).

80197865 is a wasteful number, since it uses less digits than its factorization.

80197865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640.

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

The square root of 80197865 is about 8955.3260688821. The cubic root of 80197865 is about 431.2418848855.

The spelling of 80197865 in words is "eighty million, one hundred ninety-seven thousand, eight hundred sixty-five".