813036320756 has 36 divisors (see below), whose sum is σ = 1564147221924. Its totient is φ = 369508043520.

The previous prime is 813036320743. The next prime is 813036320791. The reversal of 813036320756 is 657023630318.

It can be written as a sum of positive squares in 2 ways, for example, as 562470000400 + 250566320356 = 749980^2 + 500566^2 .

It is a super-2 number, since 2×813036320756² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3296570 + ... + 3534606.

Almost surely, 2^813036320756 is an apocalyptic number.

It is an amenable number.

813036320756 is a deficient number, since it is larger than the sum of its proper divisors (751110901168).

813036320756 is a wasteful number, since it uses less digits than its factorization.

813036320756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245120 (or 245107 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 813036320756 in words is "eight hundred thirteen billion, thirty-six million, three hundred twenty thousand, seven hundred fifty-six".