800254889891 has 2 divisors, whose sum is σ = 800254889892. Its totient is φ = 800254889890.

The previous prime is 800254889851. The next prime is 800254889897. The reversal of 800254889891 is 198988452008.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800254889891 is a prime.

It is not a weakly prime, because it can be changed into another prime (800254889897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400127444945 + 400127444946.

It is an arithmetic number, because the mean of its divisors is an integer number (400127444946).

Almost surely, 2^800254889891 is an apocalyptic number.

800254889891 is a deficient number, since it is larger than the sum of its proper divisors (1).

800254889891 is an equidigital number, since it uses as much as digits as its factorization.

800254889891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13271040, while the sum is 62.

The spelling of 800254889891 in words is "eight hundred billion, two hundred fifty-four million, eight hundred eighty-nine thousand, eight hundred ninety-one".