820271490847 has 2 divisors, whose sum is σ = 820271490848. Its totient is φ = 820271490846.

The previous prime is 820271490827. The next prime is 820271490967. The reversal of 820271490847 is 748094172028.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-820271490847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 820271490794 and 820271490803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (820271490827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410135745423 + 410135745424.

It is an arithmetic number, because the mean of its divisors is an integer number (410135745424).

Almost surely, 2^820271490847 is an apocalyptic number.

820271490847 is a deficient number, since it is larger than the sum of its proper divisors (1).

820271490847 is an equidigital number, since it uses as much as digits as its factorization.

820271490847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1806336, while the sum is 52.

The spelling of 820271490847 in words is "eight hundred twenty billion, two hundred seventy-one million, four hundred ninety thousand, eight hundred forty-seven".