813495763501 has 2 divisors, whose sum is σ = 813495763502. Its totient is φ = 813495763500.

The previous prime is 813495763447. The next prime is 813495763543. The reversal of 813495763501 is 105367594318.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 740806211401 + 72689552100 = 860701^2 + 269610^2 .

It is a cyclic number.

It is not a de Polignac number, because 813495763501 - 2¹³ = 813495755309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813495773501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406747881750 + 406747881751.

It is an arithmetic number, because the mean of its divisors is an integer number (406747881751).

Almost surely, 2^813495763501 is an apocalyptic number.

It is an amenable number.

813495763501 is a deficient number, since it is larger than the sum of its proper divisors (1).

813495763501 is an equidigital number, since it uses as much as digits as its factorization.

813495763501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 813495763501 in words is "eight hundred thirteen billion, four hundred ninety-five million, seven hundred sixty-three thousand, five hundred one".