80989779379 has 2 divisors, whose sum is σ = 80989779380. Its totient is φ = 80989779378.

The previous prime is 80989779331. The next prime is 80989779419. The reversal of 80989779379 is 97397798908.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80989779379 - 2¹⁵ = 80989746611 is a prime.

It is not a weakly prime, because it can be changed into another prime (80989779329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40494889689 + 40494889690.

It is an arithmetic number, because the mean of its divisors is an integer number (40494889690).

Almost surely, 2^80989779379 is an apocalyptic number.

80989779379 is a deficient number, since it is larger than the sum of its proper divisors (1).

80989779379 is an equidigital number, since it uses as much as digits as its factorization.

80989779379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432081216, while the sum is 76.

The spelling of 80989779379 in words is "eighty billion, nine hundred eighty-nine million, seven hundred seventy-nine thousand, three hundred seventy-nine".