81712898048 has 112 divisors (see below), whose sum is σ = 170241126624. Its totient is φ = 39182008320.

The previous prime is 81712898027. The next prime is 81712898051. The reversal of 81712898048 is 84089821718.

It is a junction number, because it is equal to n+sod(n) for n = 81712897984 and 81712898002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21518486 + ... + 21522282.

Almost surely, 2^81712898048 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 81712898048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85120563312).

81712898048 is an abundant number, since it is smaller than the sum of its proper divisors (88528228576).

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

81712898048 is an equidigital number, since it uses as much as digits as its factorization.

81712898048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3931 (or 3907 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 56.

The spelling of 81712898048 in words is "eighty-one billion, seven hundred twelve million, eight hundred ninety-eight thousand, forty-eight".