81098822525424 has 160 divisors (see below), whose sum is σ = 230364813041664. Its totient is φ = 24380415037440.

The previous prime is 81098822525393. The next prime is 81098822525473. The reversal of 81098822525424 is 42452522889018.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1678588692 + ... + 1678637004.

Almost surely, 2^{81098822525424} 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 81098822525424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115182406520832).

81098822525424 is an abundant number, since it is smaller than the sum of its proper divisors (149265990516240).

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

81098822525424 is a wasteful number, since it uses less digits than its factorization.

81098822525424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73495 (or 73489 counting only the distinct ones).

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

The spelling of 81098822525424 in words is "eighty-one trillion, ninety-eight billion, eight hundred twenty-two million, five hundred twenty-five thousand, four hundred twenty-four".