80495805 has 32 divisors (see below), whose sum is σ = 139144320. Its totient is φ = 39502080.

The previous prime is 80495801. The next prime is 80495843. The reversal of 80495805 is 50859408.

It is not a de Polignac number, because 80495805 - 2² = 80495801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80495801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98850 + ... + 99660.

It is an arithmetic number, because the mean of its divisors is an integer number (4348260).

Almost surely, 2^80495805 is an apocalyptic number.

It is an amenable number.

80495805 is a deficient number, since it is larger than the sum of its proper divisors (58648515).

80495805 is a wasteful number, since it uses less digits than its factorization.

80495805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 80495805 is about 8971.9454412073. The cubic root of 80495805 is about 431.7752549689.

The spelling of 80495805 in words is "eighty million, four hundred ninety-five thousand, eight hundred five".