81024402726 has 48 divisors (see below), whose sum is σ = 176896609344. Its totient is φ = 26801546112.

The previous prime is 81024402703. The next prime is 81024402727. The reversal of 81024402726 is 62720442018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81024402727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12260115 + ... + 12266721.

It is an arithmetic number, because the mean of its divisors is an integer number (3685346028).

Almost surely, 2^81024402726 is an apocalyptic number.

81024402726 is an abundant number, since it is smaller than the sum of its proper divisors (95872206618).

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

81024402726 is a wasteful number, since it uses less digits than its factorization.

81024402726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11725 (or 11722 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The spelling of 81024402726 in words is "eighty-one billion, twenty-four million, four hundred two thousand, seven hundred twenty-six".