2540999999 has 4 divisors (see below), whose sum is σ = 2541141720. Its totient is φ = 2540858280.

The previous prime is 2540999983. The next prime is 2541000001. The reversal of 2540999999 is 9999990452.

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 2540999999 - 2⁴ = 2540999983 is a prime.

It is a Duffinian number.

2540999999 is a modest number, since divided by 99999 gives 25409 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540999939) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 39272 + ... + 81389.

It is an arithmetic number, because the mean of its divisors is an integer number (635285430).

Almost surely, 2^2540999999 is an apocalyptic number.

2540999999 is a deficient number, since it is larger than the sum of its proper divisors (141721).

2540999999 is a wasteful number, since it uses less digits than its factorization.

2540999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141720.

The product of its (nonzero) digits is 21257640, while the sum is 65.

The square root of 2540999999 is about 50408.3326345952. The cubic root of 2540999999 is about 1364.5880223884.

The spelling of 2540999999 in words is "two billion, five hundred forty million, nine hundred ninety-nine thousand, nine hundred ninety-nine".