2540781812 has 12 divisors (see below), whose sum is σ = 4481379840. Its totient is φ = 1260387576.

The previous prime is 2540781791. The next prime is 2540781827. The reversal of 2540781812 is 2181870452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2500262 + ... + 2501277.

It is an arithmetic number, because the mean of its divisors is an integer number (373448320).

Almost surely, 2^2540781812 is an apocalyptic number.

It is an amenable number.

2540781812 is a deficient number, since it is larger than the sum of its proper divisors (1940598028).

2540781812 is a wasteful number, since it uses less digits than its factorization.

2540781812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001670 (or 5001668 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 2540781812 is about 50406.1683923704. The cubic root of 2540781812 is about 1364.5489637646.

The spelling of 2540781812 in words is "two billion, five hundred forty million, seven hundred eighty-one thousand, eight hundred twelve".