81298285848 has 128 divisors (see below), whose sum is σ = 245473804800. Its totient is φ = 24780981888.

The previous prime is 81298285829. The next prime is 81298285867. The reversal of 81298285848 is 84858289218.

81298285848 is a `hidden beast` number, since 8 + 1 + 29 + 8 + 28 + 584 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (81298285829) and next prime (81298285867).

It is a super-2 number, since 2×81298285848² (a number of 23 digits) contains 22 as substring.

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, 165165 + ... + 435747.

It is an arithmetic number, because the mean of its divisors is an integer number (1917764100).

Almost surely, 2^81298285848 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 81298285848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122736902400).

81298285848 is an abundant number, since it is smaller than the sum of its proper divisors (164175518952).

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

81298285848 is a wasteful number, since it uses less digits than its factorization.

81298285848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270718 (or 270708 counting only the distinct ones).

The product of its digits is 23592960, while the sum is 63.

The spelling of 81298285848 in words is "eighty-one billion, two hundred ninety-eight million, two hundred eighty-five thousand, eight hundred forty-eight".