8081538500 has 48 divisors (see below), whose sum is σ = 20171528832. Its totient is φ = 2770812000.

The previous prime is 8081538499. The next prime is 8081538539. The reversal of 8081538500 is 58351808.

It is a super-2 number, since 2×8081538500² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1151006 + ... + 1158005.

It is an arithmetic number, because the mean of its divisors is an integer number (420240184).

Almost surely, 2^8081538500 is an apocalyptic number.

It is an amenable number.

8081538500 is an abundant number, since it is smaller than the sum of its proper divisors (12089990332).

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

8081538500 is a wasteful number, since it uses less digits than its factorization.

8081538500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309037 (or 2309025 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 8081538500 is about 89897.3776035764. The cubic root of 8081538500 is about 2006.7719196726.

The spelling of 8081538500 in words is "eight billion, eighty-one million, five hundred thirty-eight thousand, five hundred".