81093379080 has 384 divisors, whose sum is σ = 287409358080. Its totient is φ = 18249154560.

The previous prime is 81093379067. The next prime is 81093379097. The reversal of 81093379080 is 8097339018.

It is a super-2 number, since 2×81093379080² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 155649220 + ... + 155649740.

It is an arithmetic number, because the mean of its divisors is an integer number (748461870).

Almost surely, 2^81093379080 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 81093379080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143704679040).

81093379080 is an abundant number, since it is smaller than the sum of its proper divisors (206315979000).

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

81093379080 is a wasteful number, since it uses less digits than its factorization.

81093379080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The spelling of 81093379080 in words is "eighty-one billion, ninety-three million, three hundred seventy-nine thousand, eighty".