2540547865 has 16 divisors (see below), whose sum is σ = 3079762560. Its totient is φ = 2011788160.

The previous prime is 2540547851. The next prime is 2540547899. The reversal of 2540547865 is 5687450452.

It is not a de Polignac number, because 2540547865 - 2⁵ = 2540547833 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240750 + ... + 251080.

It is an arithmetic number, because the mean of its divisors is an integer number (192485160).

Almost surely, 2^2540547865 is an apocalyptic number.

It is an amenable number.

2540547865 is a deficient number, since it is larger than the sum of its proper divisors (539214695).

2540547865 is a wasteful number, since it uses less digits than its factorization.

2540547865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10832.

The product of its (nonzero) digits is 1344000, while the sum is 46.

The square root of 2540547865 is about 50403.8477201890. The cubic root of 2540547865 is about 1364.5070813889.

The spelling of 2540547865 in words is "two billion, five hundred forty million, five hundred forty-seven thousand, eight hundred sixty-five".