8081500139478 has 24 divisors (see below), whose sum is σ = 17510055573816. Its totient is φ = 2693812056000.

The previous prime is 8081500139389. The next prime is 8081500139483. The reversal of 8081500139478 is 8749310051808.

8081500139478 is a `hidden beast` number, since 8 + 0 + 8 + 150 + 0 + 13 + 9 + 478 = 666.

It is a super-2 number, since 2×8081500139478² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 649678 + ... + 4072478.

It is an arithmetic number, because the mean of its divisors is an integer number (729585648909).

Almost surely, 2^{8081500139478} is an apocalyptic number.

8081500139478 is an abundant number, since it is smaller than the sum of its proper divisors (9428555434338).

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

8081500139478 is a wasteful number, since it uses less digits than its factorization.

8081500139478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553980 (or 3553977 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 8081500139478 in words is "eight trillion, eighty-one billion, five hundred million, one hundred thirty-nine thousand, four hundred seventy-eight".