811331625149 has 2 divisors, whose sum is σ = 811331625150. Its totient is φ = 811331625148.

The previous prime is 811331625113. The next prime is 811331625211. The reversal of 811331625149 is 941526133118.

811331625149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415573622500 + 395758002649 = 644650^2 + 629093^2 .

It is a cyclic number.

It is not a de Polignac number, because 811331625149 - 2⁸ = 811331624893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (811331622149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405665812574 + 405665812575.

It is an arithmetic number, because the mean of its divisors is an integer number (405665812575).

Almost surely, 2^811331625149 is an apocalyptic number.

It is an amenable number.

811331625149 is a deficient number, since it is larger than the sum of its proper divisors (1).

811331625149 is an equidigital number, since it uses as much as digits as its factorization.

811331625149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 44.

The spelling of 811331625149 in words is "eight hundred eleven billion, three hundred thirty-one million, six hundred twenty-five thousand, one hundred forty-nine".