81095454720 has 1248 divisors, whose sum is σ = 348260351040. Its totient is φ = 17836277760.

The previous prime is 81095454703. The next prime is 81095454721. The reversal of 81095454720 is 2745459018.

81095454720 is a `hidden beast` number, since 8 + 10 + 95 + 4 + 547 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81095454721) by changing a digit.

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, 1110896604 + ... + 1110896676.

Almost surely, 2^81095454720 is an apocalyptic number.

81095454720 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 81095454720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174130175520).

81095454720 is an abundant number, since it is smaller than the sum of its proper divisors (267164896320).

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

81095454720 is a wasteful number, since it uses less digits than its factorization.

81095454720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 81095454720 in words is "eighty-one billion, ninety-five million, four hundred fifty-four thousand, seven hundred twenty".