8145208725 has 24 divisors (see below), whose sum is σ = 14258908800. Its totient is φ = 4088574720.

The previous prime is 8145208723. The next prime is 8145208751. The reversal of 8145208725 is 5278025418.

8145208725 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8145208725 - 2¹ = 8145208723 is a prime.

It is a super-2 number, since 2×8145208725² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8145208723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3192925 + ... + 3195474.

It is an arithmetic number, because the mean of its divisors is an integer number (594121200).

Almost surely, 2^8145208725 is an apocalyptic number.

8145208725 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8145208725 is a deficient number, since it is larger than the sum of its proper divisors (6113700075).

8145208725 is a wasteful number, since it uses less digits than its factorization.

8145208725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6388429 (or 6388424 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 42.

The square root of 8145208725 is about 90250.8101071675. The cubic root of 8145208725 is about 2012.0282427523.

The spelling of 8145208725 in words is "eight billion, one hundred forty-five million, two hundred eight thousand, seven hundred twenty-five".