80711745 has 16 divisors (see below), whose sum is σ = 129558912. Its totient is φ = 42906240.

The previous prime is 80711711. The next prime is 80711749. The reversal of 80711745 is 54711708.

It is not a de Polignac number, because 80711745 - 2⁶ = 80711681 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80711749) 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, 3901 + ... + 13290.

It is an arithmetic number, because the mean of its divisors is an integer number (8097432).

Almost surely, 2^80711745 is an apocalyptic number.

It is an amenable number.

80711745 is a deficient number, since it is larger than the sum of its proper divisors (48847167).

80711745 is a wasteful number, since it uses less digits than its factorization.

80711745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17512.

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 80711745 is about 8983.9715605071. The cubic root of 80711745 is about 432.1610071574.

The spelling of 80711745 in words is "eighty million, seven hundred eleven thousand, seven hundred forty-five".