2540584391 has 4 divisors (see below), whose sum is σ = 2609248872. Its totient is φ = 2471919912.

The previous prime is 2540584381. The next prime is 2540584451. The reversal of 2540584391 is 1934850452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2540584391 - 2³⁰ = 1466842567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540584381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34332185 + ... + 34332258.

It is an arithmetic number, because the mean of its divisors is an integer number (652312218).

Almost surely, 2^2540584391 is an apocalyptic number.

2540584391 is a deficient number, since it is larger than the sum of its proper divisors (68664481).

2540584391 is an equidigital number, since it uses as much as digits as its factorization.

2540584391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68664480.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 2540584391 is about 50404.2100523359. The cubic root of 2540584391 is about 1364.5136206276.

The spelling of 2540584391 in words is "two billion, five hundred forty million, five hundred eighty-four thousand, three hundred ninety-one".