813365243401 has 2 divisors, whose sum is σ = 813365243402. Its totient is φ = 813365243400.

The previous prime is 813365243363. The next prime is 813365243443. The reversal of 813365243401 is 104342563318.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 437252885001 + 376112358400 = 661251^2 + 613280^2 .

It is a cyclic number.

It is not a de Polignac number, because 813365243401 - 2³¹ = 811217759753 is a prime.

It is not a weakly prime, because it can be changed into another prime (813365243461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406682621700 + 406682621701.

It is an arithmetic number, because the mean of its divisors is an integer number (406682621701).

Almost surely, 2^813365243401 is an apocalyptic number.

It is an amenable number.

813365243401 is a deficient number, since it is larger than the sum of its proper divisors (1).

813365243401 is an equidigital number, since it uses as much as digits as its factorization.

813365243401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 813365243401 in words is "eight hundred thirteen billion, three hundred sixty-five million, two hundred forty-three thousand, four hundred one".