801585723091 has 2 divisors, whose sum is σ = 801585723092. Its totient is φ = 801585723090.

The previous prime is 801585723067. The next prime is 801585723097. The reversal of 801585723091 is 190327585108.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-801585723091 is a prime.

It is not a weakly prime, because it can be changed into another prime (801585723097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400792861545 + 400792861546.

It is an arithmetic number, because the mean of its divisors is an integer number (400792861546).

Almost surely, 2^801585723091 is an apocalyptic number.

801585723091 is a deficient number, since it is larger than the sum of its proper divisors (1).

801585723091 is an equidigital number, since it uses as much as digits as its factorization.

801585723091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 49.

The spelling of 801585723091 in words is "eight hundred one billion, five hundred eighty-five million, seven hundred twenty-three thousand, ninety-one".