81274548096 has 1024 divisors, whose sum is σ = 303630336000. Its totient is φ = 20901888000.

The previous prime is 81274548077. The next prime is 81274548211. The reversal of 81274548096 is 69084547218.

It is a happy number.

81274548096 is a `hidden beast` number, since 8 + 1 + 2 + 7 + 4 + 548 + 0 + 96 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 804698446 + ... + 804698546.

It is an arithmetic number, because the mean of its divisors is an integer number (296514000).

Almost surely, 2^81274548096 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 81274548096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151815168000).

81274548096 is an abundant number, since it is smaller than the sum of its proper divisors (222355787904).

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

81274548096 is a wasteful number, since it uses less digits than its factorization.

81274548096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 81274548096 in words is "eighty-one billion, two hundred seventy-four million, five hundred forty-eight thousand, ninety-six".