81026422900 has 36 divisors (see below), whose sum is σ = 177534421792. Its totient is φ = 32095899360.

The previous prime is 81026422891. The next prime is 81026422901. The reversal of 81026422900 is 922462018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81026422901) 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, 3923022 + ... + 3943621.

Almost surely, 2^81026422900 is an apocalyptic number.

It is an amenable number.

81026422900 is an abundant number, since it is smaller than the sum of its proper divisors (96507998892).

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

81026422900 is a wasteful number, since it uses less digits than its factorization.

81026422900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7866760 (or 7866753 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

Adding to 81026422900 its reverse (922462018), we get a palindrome (81948884918).

The spelling of 81026422900 in words is "eighty-one billion, twenty-six million, four hundred twenty-two thousand, nine hundred".