811235422744 has 16 divisors (see below), whose sum is σ = 1521103105800. Its totient is φ = 405607927872.

The previous prime is 811235422649. The next prime is 811235422747. The reversal of 811235422744 is 447224532118.

It is a super-2 number, since 2×811235422744² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 811235422744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811235422747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 864349 + ... + 1539340.

Almost surely, 2^811235422744 is an apocalyptic number.

It is an amenable number.

811235422744 is a deficient number, since it is larger than the sum of its proper divisors (709867683056).

811235422744 is a wasteful number, since it uses less digits than its factorization.

811235422744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445882 (or 2445878 counting only the distinct ones).

The product of its digits is 430080, while the sum is 43.

The spelling of 811235422744 in words is "eight hundred eleven billion, two hundred thirty-five million, four hundred twenty-two thousand, seven hundred forty-four".