8500388505 has 32 divisors (see below), whose sum is σ = 16079558400. Its totient is φ = 3751894272.

The previous prime is 8500388497. The next prime is 8500388537. The reversal of 8500388505 is 5058830058.

It is not a de Polignac number, because 8500388505 - 2³ = 8500388497 is a prime.

It is a super-2 number, since 2×8500388505² (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 31 ways as a sum of consecutive naturals, for example, 1392750 + ... + 1398839.

It is an arithmetic number, because the mean of its divisors is an integer number (502486200).

Almost surely, 2^8500388505 is an apocalyptic number.

It is an amenable number.

8500388505 is a deficient number, since it is larger than the sum of its proper divisors (7579169895).

8500388505 is a wasteful number, since it uses less digits than its factorization.

8500388505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2791633.

The product of its (nonzero) digits is 192000, while the sum is 42.

The square root of 8500388505 is about 92197.5515130418. The cubic root of 8500388505 is about 2040.8586434931.

The spelling of 8500388505 in words is "eight billion, five hundred million, three hundred eighty-eight thousand, five hundred five".