80751785 has 16 divisors (see below), whose sum is σ = 102903696. Its totient is φ = 60622848.

The previous prime is 80751763. The next prime is 80751787. The reversal of 80751785 is 58715708.

It can be written as a sum of positive squares in 8 ways, for example, as 1968409 + 78783376 = 1403^2 + 8876^2 .

It is a cyclic number.

It is not a de Polignac number, because 80751785 - 2¹⁸ = 80489641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80751787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32549 + ... + 34941.

It is an arithmetic number, because the mean of its divisors is an integer number (6431481).

Almost surely, 2^80751785 is an apocalyptic number.

80751785 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

80751785 is a deficient number, since it is larger than the sum of its proper divisors (22151911).

80751785 is a wasteful number, since it uses less digits than its factorization.

80751785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812.

The product of its (nonzero) digits is 78400, while the sum is 41.

The square root of 80751785 is about 8986.1996973137. The cubic root of 80751785 is about 432.2324584112.

The spelling of 80751785 in words is "eighty million, seven hundred fifty-one thousand, seven hundred eighty-five".