2540390403765 has 16 divisors (see below), whose sum is σ = 4065540002496. Its totient is φ = 1354569763200.

The previous prime is 2540390403739. The next prime is 2540390403769. The reversal of 2540390403765 is 5673040930452.

It is not a de Polignac number, because 2540390403765 - 2⁷ = 2540390403637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540390403769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19001091 + ... + 19134320.

It is an arithmetic number, because the mean of its divisors is an integer number (254096250156).

Almost surely, 2^{2540390403765} is an apocalyptic number.

It is an amenable number.

2540390403765 is a deficient number, since it is larger than the sum of its proper divisors (1525149598731).

2540390403765 is a wasteful number, since it uses less digits than its factorization.

2540390403765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38139860.

The product of its (nonzero) digits is 2721600, while the sum is 48.

The spelling of 2540390403765 in words is "two trillion, five hundred forty billion, three hundred ninety million, four hundred three thousand, seven hundred sixty-five".