81054871645248 has 336 divisors, whose sum is σ = 235107468490752. Its totient is φ = 26697216000000.

The previous prime is 81054871645219. The next prime is 81054871645271. The reversal of 81054871645248 is 84254617845018.

81054871645248 is a `hidden beast` number, since 8 + 1 + 0 + 5 + 48 + 7 + 1 + 64 + 524 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20258651248 + ... + 20258655248.

Almost surely, 2^{81054871645248} 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 81054871645248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117553734245376).

81054871645248 is an abundant number, since it is smaller than the sum of its proper divisors (154052596845504).

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

81054871645248 is a wasteful number, since it uses less digits than its factorization.

81054871645248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5234 (or 5221 counting only the distinct ones).

The product of its (nonzero) digits is 68812800, while the sum is 63.

The spelling of 81054871645248 in words is "eighty-one trillion, fifty-four billion, eight hundred seventy-one million, six hundred forty-five thousand, two hundred forty-eight".