2540125138 has 8 divisors (see below), whose sum is σ = 3941573580. Its totient is φ = 1226267280.

The previous prime is 2540125123. The next prime is 2540125141. The reversal of 2540125138 is 8315210452.

It can be written as a sum of positive squares in 2 ways, for example, as 2249320329 + 290804809 = 47427^2 + 17053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21897573 + ... + 21897688.

Almost surely, 2^2540125138 is an apocalyptic number.

2540125138 is a deficient number, since it is larger than the sum of its proper divisors (1401448442).

2540125138 is a wasteful number, since it uses less digits than its factorization.

2540125138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43795292.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 2540125138 is about 50399.6541456387. The cubic root of 2540125138 is about 1364.4313961416.

The spelling of 2540125138 in words is "two billion, five hundred forty million, one hundred twenty-five thousand, one hundred thirty-eight".