80615849 has 2 divisors, whose sum is σ = 80615850. Its totient is φ = 80615848.

The previous prime is 80615813. The next prime is 80615861. The reversal of 80615849 is 94851608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71098624 + 9517225 = 8432^2 + 3085^2 .

It is a cyclic number.

It is not a de Polignac number, because 80615849 - 2²⁰ = 79567273 is a prime.

It is not a weakly prime, because it can be changed into another prime (80615149) 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 as a sum of consecutive naturals, namely, 40307924 + 40307925.

It is an arithmetic number, because the mean of its divisors is an integer number (40307925).

Almost surely, 2^80615849 is an apocalyptic number.

It is an amenable number.

80615849 is a deficient number, since it is larger than the sum of its proper divisors (1).

80615849 is an equidigital number, since it uses as much as digits as its factorization.

80615849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 80615849 is about 8978.6329137570. The cubic root of 80615849 is about 431.9897849236.

The spelling of 80615849 in words is "eighty million, six hundred fifteen thousand, eight hundred forty-nine".