6138193725 has 18 divisors (see below), whose sum is σ = 10994187386. Its totient is φ = 3273703200.

The previous prime is 6138193687. The next prime is 6138193729. The reversal of 6138193725 is 5273918316.

6138193725 is a `hidden beast` number, since 613 + 8 + 1 + 9 + 3 + 7 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 35928036 + 6102265689 = 5994^2 + 78117^2 .

It is not a de Polignac number, because 6138193725 - 2⁷ = 6138193597 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6138193729) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13640206 + ... + 13640655.

Almost surely, 2^6138193725 is an apocalyptic number.

It is an amenable number.

6138193725 is a deficient number, since it is larger than the sum of its proper divisors (4855993661).

6138193725 is a wasteful number, since it uses less digits than its factorization.

6138193725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27280877 (or 27280869 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 6138193725 is about 78346.6254857221. The cubic root of 6138193725 is about 1830.9656508879.

The spelling of 6138193725 in words is "six billion, one hundred thirty-eight million, one hundred ninety-three thousand, seven hundred twenty-five".