813391628116 has 12 divisors (see below), whose sum is σ = 1423624763988. Its totient is φ = 406641695552.

The previous prime is 813391628107. The next prime is 813391628143. The reversal of 813391628116 is 611826193318.

It can be written as a sum of positive squares in 2 ways, for example, as 346916288016 + 466475340100 = 588996^2 + 682990^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 813391628116.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13495801 + ... + 13555936.

It is an arithmetic number, because the mean of its divisors is an integer number (118635396999).

Almost surely, 2^813391628116 is an apocalyptic number.

It is an amenable number.

813391628116 is a deficient number, since it is larger than the sum of its proper divisors (610233135872).

813391628116 is a wasteful number, since it uses less digits than its factorization.

813391628116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27059258 (or 27059256 counting only the distinct ones).

The product of its digits is 373248, while the sum is 49.

The spelling of 813391628116 in words is "eight hundred thirteen billion, three hundred ninety-one million, six hundred twenty-eight thousand, one hundred sixteen".