8138454825 has 24 divisors (see below), whose sum is σ = 13656416608. Its totient is φ = 4275722880.

The previous prime is 8138454809. The next prime is 8138454827. The reversal of 8138454825 is 5284548318.

It is not a de Polignac number, because 8138454825 - 2⁴ = 8138454809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8138454827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 804772 + ... + 814821.

Almost surely, 2^8138454825 is an apocalyptic number.

It is an amenable number.

8138454825 is a deficient number, since it is larger than the sum of its proper divisors (5517961783).

8138454825 is a wasteful number, since it uses less digits than its factorization.

8138454825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619673 (or 1619668 counting only the distinct ones).

The product of its digits is 1228800, while the sum is 48.

The square root of 8138454825 is about 90213.3849547837. The cubic root of 8138454825 is about 2011.4719731838.

The spelling of 8138454825 in words is "eight billion, one hundred thirty-eight million, four hundred fifty-four thousand, eight hundred twenty-five".