2540390403766 has 8 divisors (see below), whose sum is σ = 3858820866720. Its totient is φ = 1254116781528.

The previous prime is 2540390403739. The next prime is 2540390403769. The reversal of 2540390403766 is 6673040930452.

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

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 3 ways as a sum of consecutive naturals, for example, 8039209981 + ... + 8039210296.

It is an arithmetic number, because the mean of its divisors is an integer number (482352608340).

Almost surely, 2^{2540390403766} is an apocalyptic number.

2540390403766 is a deficient number, since it is larger than the sum of its proper divisors (1318430462954).

2540390403766 is a wasteful number, since it uses less digits than its factorization.

2540390403766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16078420358.

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 2540390403766 in words is "two trillion, five hundred forty billion, three hundred ninety million, four hundred three thousand, seven hundred sixty-six".