811143222516 has 108 divisors (see below), whose sum is σ = 2271481744896. Its totient is φ = 243865369440.

The previous prime is 811143222499. The next prime is 811143222541. The reversal of 811143222516 is 615222341118.

811143222516 is a `hidden beast` number, since 8 + 1 + 114 + 3 + 2 + 22 + 516 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 179910 + ... + 1286333.

Almost surely, 2^811143222516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 811143222516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1135740872448).

811143222516 is an abundant number, since it is smaller than the sum of its proper divisors (1460338522380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811143222516 is a wasteful number, since it uses less digits than its factorization.

811143222516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466402 (or 1466386 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The spelling of 811143222516 in words is "eight hundred eleven billion, one hundred forty-three million, two hundred twenty-two thousand, five hundred sixteen".