811948398863 has 12 divisors (see below), whose sum is σ = 947996700192. Its totient is φ = 693387656640.

The previous prime is 811948398853. The next prime is 811948398917. The reversal of 811948398863 is 368893849118.

It is a happy number.

It is not a de Polignac number, because 811948398863 - 2⁶ = 811948398799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 811948398793 and 811948398802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811948398853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30559370 + ... + 30585927.

It is an arithmetic number, because the mean of its divisors is an integer number (78999725016).

Almost surely, 2^811948398863 is an apocalyptic number.

811948398863 is a deficient number, since it is larger than the sum of its proper divisors (136048301329).

811948398863 is a wasteful number, since it uses less digits than its factorization.

811948398863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61145582 (or 61145575 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 68.

The spelling of 811948398863 in words is "eight hundred eleven billion, nine hundred forty-eight million, three hundred ninety-eight thousand, eight hundred sixty-three".