80717761 has 2 divisors, whose sum is σ = 80717762. Its totient is φ = 80717760.

The previous prime is 80717743. The next prime is 80717809. The reversal of 80717761 is 16771708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73427761 + 7290000 = 8569^2 + 2700^2 .

It is a cyclic number.

It is not a de Polignac number, because 80717761 - 2¹⁵ = 80684993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80717761.

It is not a weakly prime, because it can be changed into another prime (80717711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40358880 + 40358881.

It is an arithmetic number, because the mean of its divisors is an integer number (40358881).

Almost surely, 2^80717761 is an apocalyptic number.

It is an amenable number.

80717761 is a deficient number, since it is larger than the sum of its proper divisors (1).

80717761 is an equidigital number, since it uses as much as digits as its factorization.

80717761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16464, while the sum is 37.

The square root of 80717761 is about 8984.3063727814. The cubic root of 80717761 is about 432.1717441987.

The spelling of 80717761 in words is "eighty million, seven hundred seventeen thousand, seven hundred sixty-one".