8157469725 has 18 divisors (see below), whose sum is σ = 14610935066. Its totient is φ = 4350650400.

The previous prime is 8157469721. The next prime is 8157469729. The reversal of 8157469725 is 5279647518.

8157469725 is a `hidden beast` number, since 8 + 1 + 574 + 69 + 7 + 2 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (8157469721) and next prime (8157469729).

It can be written as a sum of positive squares in 3 ways, for example, as 1202910489 + 6954559236 = 34683^2 + 83394^2 .

It is not a de Polignac number, because 8157469725 - 2² = 8157469721 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 (8157469721) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 18127486 + ... + 18127935.

Almost surely, 2^8157469725 is an apocalyptic number.

It is an amenable number.

8157469725 is a deficient number, since it is larger than the sum of its proper divisors (6453465341).

8157469725 is a wasteful number, since it uses less digits than its factorization.

8157469725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36255437 (or 36255429 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 54.

The square root of 8157469725 is about 90318.7119316922. The cubic root of 8157469725 is about 2013.0373067358.

The spelling of 8157469725 in words is "eight billion, one hundred fifty-seven million, four hundred sixty-nine thousand, seven hundred twenty-five".