8081505999 has 40 divisors (see below), whose sum is σ = 14523175040. Its totient is φ = 4374944784.

The previous prime is 8081505973. The next prime is 8081506003. The reversal of 8081505999 is 9995051808.

It is not a de Polignac number, because 8081505999 - 2⁵ = 8081505967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8081505499) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 364309 + ... + 385854.

It is an arithmetic number, because the mean of its divisors is an integer number (363079376).

Almost surely, 2^8081505999 is an apocalyptic number.

8081505999 is a deficient number, since it is larger than the sum of its proper divisors (6441669041).

8081505999 is a wasteful number, since it uses less digits than its factorization.

8081505999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750201 (or 750192 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 54.

The square root of 8081505999 is about 89897.1968361639. The cubic root of 8081505999 is about 2006.7692295007.

The spelling of 8081505999 in words is "eight billion, eighty-one million, five hundred five thousand, nine hundred ninety-nine".