813477396461 has 2 divisors, whose sum is σ = 813477396462. Its totient is φ = 813477396460.

The previous prime is 813477396443. The next prime is 813477396481. The reversal of 813477396461 is 164693774318.

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., 642065664100 + 171411732361 = 801290^2 + 414019^2 .

It is a cyclic number.

It is not a de Polignac number, because 813477396461 - 2²⁶ = 813410287597 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 813477396461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813477396481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406738698230 + 406738698231.

It is an arithmetic number, because the mean of its divisors is an integer number (406738698231).

Almost surely, 2^813477396461 is an apocalyptic number.

It is an amenable number.

813477396461 is a deficient number, since it is larger than the sum of its proper divisors (1).

813477396461 is an equidigital number, since it uses as much as digits as its factorization.

813477396461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 59.

The spelling of 813477396461 in words is "eight hundred thirteen billion, four hundred seventy-seven million, three hundred ninety-six thousand, four hundred sixty-one".