2540348259409 has 3 divisors (see below), whose sum is σ = 2540349853257. Its totient is φ = 2540346665562.

The previous prime is 2540348259301. The next prime is 2540348259419. The reversal of 2540348259409 is 9049528430452.

The square root of 2540348259409 is 1593847.

It is a perfect power (a square), and thus also a powerful number.

2540348259409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 2540348259409 - 2³³ = 2531758324817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2540348259409.

It is not an unprimeable number, because it can be changed into a prime (2540348259419) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 796924 + ... + 2390770.

It is an arithmetic number, because the mean of its divisors is an integer number (846783284419).

Almost surely, 2^{2540348259409} is an apocalyptic number.

2540348259409 is the 1593847-th square number.

2540348259409 is the 796924-th centered octagonal number.

It is an amenable number.

2540348259409 is a deficient number, since it is larger than the sum of its proper divisors (1593848).

2540348259409 is an frugal number, since it uses more digits than its factorization.

2540348259409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3187694 (or 1593847 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 55.

The spelling of 2540348259409 in words is "two trillion, five hundred forty billion, three hundred forty-eight million, two hundred fifty-nine thousand, four hundred nine".