812423565888 has 224 divisors, whose sum is σ = 2383917365760. Its totient is φ = 242110218240.

The previous prime is 812423565887. The next prime is 812423565913. The reversal of 812423565888 is 888565324218.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (812423565887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90982608 + ... + 90991536.

It is an arithmetic number, because the mean of its divisors is an integer number (10642488240).

Almost surely, 2^812423565888 is an apocalyptic number.

812423565888 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 812423565888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1191958682880).

812423565888 is an abundant number, since it is smaller than the sum of its proper divisors (1571493799872).

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

812423565888 is a wasteful number, since it uses less digits than its factorization.

812423565888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9665 (or 9655 counting only the distinct ones).

The product of its digits is 29491200, while the sum is 60.

The spelling of 812423565888 in words is "eight hundred twelve billion, four hundred twenty-three million, five hundred sixty-five thousand, eight hundred eighty-eight".