8081647799040 has 864 divisors, whose sum is σ = 29831991134400. Its totient is φ = 2014225367040.

The previous prime is 8081647799009. The next prime is 8081647799063. The reversal of 8081647799040 is 409977461808.

8081647799040 is a `hidden beast` number, since 80 + 81 + 6 + 477 + 9 + 9 + 0 + 4 + 0 = 666.

It is a super-2 number, since 2×8081647799040² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5427566616 + ... + 5427568104.

Almost surely, 2^{8081647799040} is an apocalyptic number.

8081647799040 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 8081647799040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14915995567200).

8081647799040 is an abundant number, since it is smaller than the sum of its proper divisors (21750343335360).

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

8081647799040 is a wasteful number, since it uses less digits than its factorization.

8081647799040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853 (or 1836 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 63.

The spelling of 8081647799040 in words is "eight trillion, eighty-one billion, six hundred forty-seven million, seven hundred ninety-nine thousand, forty".