8145931725 has 48 divisors (see below), whose sum is σ = 15246792000. Its totient is φ = 4262506560.

The previous prime is 8145931711. The next prime is 8145931741. The reversal of 8145931725 is 5271395418.

It is a de Polignac number, because none of the positive numbers 2^k-8145931725 is a prime.

It is a super-2 number, since 2×8145931725² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78075 + ... + 149624.

It is an arithmetic number, because the mean of its divisors is an integer number (317641500).

Almost surely, 2^8145931725 is an apocalyptic number.

It is an amenable number.

8145931725 is a deficient number, since it is larger than the sum of its proper divisors (7100860275).

8145931725 is a wasteful number, since it uses less digits than its factorization.

8145931725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227771 (or 227760 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 8145931725 is about 90254.8155224972. The cubic root of 8145931725 is about 2012.0877727750.

The spelling of 8145931725 in words is "eight billion, one hundred forty-five million, nine hundred thirty-one thousand, seven hundred twenty-five".