2540743878 has 16 divisors (see below), whose sum is σ = 5348934720. Its totient is φ = 802340136.

The previous prime is 2540743871. The next prime is 2540743927. The reversal of 2540743878 is 8783470452.

2540743878 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540743871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11143500 + ... + 11143727.

It is an arithmetic number, because the mean of its divisors is an integer number (334308420).

Almost surely, 2^2540743878 is an apocalyptic number.

2540743878 is an abundant number, since it is smaller than the sum of its proper divisors (2808190842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2540743878 is a wasteful number, since it uses less digits than its factorization.

2540743878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22287251.

The product of its (nonzero) digits is 1505280, while the sum is 48.

The square root of 2540743878 is about 50405.7921076537. The cubic root of 2540743878 is about 1364.5421728026.

The spelling of 2540743878 in words is "two billion, five hundred forty million, seven hundred forty-three thousand, eight hundred seventy-eight".