2540706538 has 8 divisors (see below), whose sum is σ = 3811587300. Its totient is φ = 1270177440.

The previous prime is 2540706533. The next prime is 2540706601. The reversal of 2540706538 is 8356070452.

2540706538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2237006209 + 303700329 = 47297^2 + 17427^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 2540706538.

It is not an unprimeable number, because it can be changed into a prime (2540706533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69043 + ... + 99238.

Almost surely, 2^2540706538 is an apocalyptic number.

2540706538 is a deficient number, since it is larger than the sum of its proper divisors (1270880762).

2540706538 is a wasteful number, since it uses less digits than its factorization.

2540706538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175832.

The product of its (nonzero) digits is 201600, while the sum is 40.

The square root of 2540706538 is about 50405.4217123515. The cubic root of 2540706538 is about 1364.5354881128.

The spelling of 2540706538 in words is "two billion, five hundred forty million, seven hundred six thousand, five hundred thirty-eight".