2574138509 has 4 divisors (see below), whose sum is σ = 2576494716. Its totient is φ = 2571782304.

The previous prime is 2574138499. The next prime is 2574138517. The reversal of 2574138509 is 9058314752.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2459862409 + 114276100 = 49597^2 + 10690^2 .

It is a cyclic number.

It is not a de Polignac number, because 2574138509 - 2²⁴ = 2557361293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2574138509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2574138529) 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 3 ways as a sum of consecutive naturals, for example, 1176464 + ... + 1178649.

It is an arithmetic number, because the mean of its divisors is an integer number (644123679).

Almost surely, 2^2574138509 is an apocalyptic number.

It is an amenable number.

2574138509 is a deficient number, since it is larger than the sum of its proper divisors (2356207).

2574138509 is a wasteful number, since it uses less digits than its factorization.

2574138509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356206.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 2574138509 is about 50735.9685923113. The cubic root of 2574138509 is about 1370.4945217773.

The spelling of 2574138509 in words is "two billion, five hundred seventy-four million, one hundred thirty-eight thousand, five hundred nine".