2540976778439 has 32 divisors (see below), whose sum is σ = 2801228728320. Its totient is φ = 2285754508800.

The previous prime is 2540976778421. The next prime is 2540976778453. The reversal of 2540976778439 is 9348776790452.

2540976778439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2540976778439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540976778139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 360061199 + ... + 360068255.

It is an arithmetic number, because the mean of its divisors is an integer number (87538397760).

Almost surely, 2^{2540976778439} is an apocalyptic number.

2540976778439 is a deficient number, since it is larger than the sum of its proper divisors (260251949881).

2540976778439 is a wasteful number, since it uses less digits than its factorization.

2540976778439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8111.

The product of its (nonzero) digits is 640120320, while the sum is 71.

The spelling of 2540976778439 in words is "two trillion, five hundred forty billion, nine hundred seventy-six million, seven hundred seventy-eight thousand, four hundred thirty-nine".