81075201480 has 1536 divisors, whose sum is σ = 364290048000. Its totient is φ = 15656509440.

The previous prime is 81075201479. The next prime is 81075201491. The reversal of 81075201480 is 8410257018.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 383 ways as a sum of consecutive naturals, for example, 910957276 + ... + 910957364.

It is an arithmetic number, because the mean of its divisors is an integer number (237168000).

Almost surely, 2^81075201480 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 81075201480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182145024000).

81075201480 is an abundant number, since it is smaller than the sum of its proper divisors (283214846520).

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

81075201480 is a wasteful number, since it uses less digits than its factorization.

81075201480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

Adding to 81075201480 its reverse (8410257018), we get a palindrome (89485458498).

The spelling of 81075201480 in words is "eighty-one billion, seventy-five million, two hundred one thousand, four hundred eighty".