80249765 has 8 divisors (see below), whose sum is σ = 96914040. Its totient is φ = 63790272.

The previous prime is 80249753. The next prime is 80249773. The reversal of 80249765 is 56794208.

It can be written as a sum of positive squares in 4 ways, for example, as 5841889 + 74407876 = 2417^2 + 8626^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80249765 - 2¹⁰ = 80248741 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 50330 + ... + 51899.

It is an arithmetic number, because the mean of its divisors is an integer number (12114255).

Almost surely, 2^80249765 is an apocalyptic number.

It is an amenable number.

80249765 is a deficient number, since it is larger than the sum of its proper divisors (16664275).

80249765 is a wasteful number, since it uses less digits than its factorization.

80249765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102391.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 80249765 is about 8958.2233171539. The cubic root of 80249765 is about 431.3348908007.

The spelling of 80249765 in words is "eighty million, two hundred forty-nine thousand, seven hundred sixty-five".