2820402486491 has 2 divisors, whose sum is σ = 2820402486492. Its totient is φ = 2820402486490.

The previous prime is 2820402486397. The next prime is 2820402486571. The reversal of 2820402486491 is 1946842040282.

2820402486491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2820402486491 - 2³⁸ = 2545524579547 is a prime.

It is not a weakly prime, because it can be changed into another prime (2820402486791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410201243245 + 1410201243246.

It is an arithmetic number, because the mean of its divisors is an integer number (1410201243246).

Almost surely, 2^{2820402486491} is an apocalyptic number.

2820402486491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2820402486491 is an equidigital number, since it uses as much as digits as its factorization.

2820402486491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1769472, while the sum is 50.

The spelling of 2820402486491 in words is "two trillion, eight hundred twenty billion, four hundred two million, four hundred eighty-six thousand, four hundred ninety-one".