81104302648320 has 352 divisors, whose sum is σ = 297190206912000. Its totient is φ = 18492790800384.

The previous prime is 81104302648307. The next prime is 81104302648339. The reversal of 81104302648320 is 2384620340118.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43053531 + ... + 44897829.

Almost surely, 2^{81104302648320} is an apocalyptic number.

81104302648320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81104302648320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148595103456000).

81104302648320 is an abundant number, since it is smaller than the sum of its proper divisors (216085904263680).

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

81104302648320 is a wasteful number, since it uses less digits than its factorization.

81104302648320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1844743 (or 1844725 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

Adding to 81104302648320 its reverse (2384620340118), we get a palindrome (83488922988438).

The spelling of 81104302648320 in words is "eighty-one trillion, one hundred four billion, three hundred two million, six hundred forty-eight thousand, three hundred twenty".