8101812779 has 2 divisors, whose sum is σ = 8101812780. Its totient is φ = 8101812778.

The previous prime is 8101812731. The next prime is 8101812811. The reversal of 8101812779 is 9772181018.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8101812779 - 2¹⁶ = 8101747243 is a prime.

It is not a weakly prime, because it can be changed into another prime (8101812709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4050906389 + 4050906390.

It is an arithmetic number, because the mean of its divisors is an integer number (4050906390).

Almost surely, 2^8101812779 is an apocalyptic number.

8101812779 is a deficient number, since it is larger than the sum of its proper divisors (1).

8101812779 is an equidigital number, since it uses as much as digits as its factorization.

8101812779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 44.

The square root of 8101812779 is about 90010.0704310357. The cubic root of 8101812779 is about 2008.4486580830.

The spelling of 8101812779 in words is "eight billion, one hundred one million, eight hundred twelve thousand, seven hundred seventy-nine".