813495763601 has 4 divisors (see below), whose sum is σ = 821550177204. Its totient is φ = 805441350000.

The previous prime is 813495763589. The next prime is 813495763627. The reversal of 813495763601 is 106367594318.

It is a Cunningham number, because it is equal to 901940²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 781597446400 + 31898317201 = 884080^2 + 178601^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813495763601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (813495763501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4027206650 + ... + 4027206851.

It is an arithmetic number, because the mean of its divisors is an integer number (205387544301).

Almost surely, 2^813495763601 is an apocalyptic number.

It is an amenable number.

813495763601 is a deficient number, since it is larger than the sum of its proper divisors (8054413603).

813495763601 is a wasteful number, since it uses less digits than its factorization.

813495763601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8054413602.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 813495763601 in words is "eight hundred thirteen billion, four hundred ninety-five million, seven hundred sixty-three thousand, six hundred one".