2540159999 has 16 divisors (see below), whose sum is σ = 2768892000. Its totient is φ = 2316297600.

The previous prime is 2540159959. The next prime is 2540160011. The reversal of 2540159999 is 9999510452.

It is a Cunningham number, because it is equal to 50400²-1.

It is a cyclic number.

It is not a de Polignac number, because 2540159999 - 2²⁴ = 2523382783 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2540159999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540159929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 653249 + ... + 657125.

It is an arithmetic number, because the mean of its divisors is an integer number (173055750).

Almost surely, 2^2540159999 is an apocalyptic number.

2540159999 is a deficient number, since it is larger than the sum of its proper divisors (228732001).

2540159999 is a wasteful number, since it uses less digits than its factorization.

2540159999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490.

The product of its (nonzero) digits is 1312200, while the sum is 53.

The square root of 2540159999 is about 50399.9999900794. Note that the first 5 decimals coincide. The cubic root of 2540159999 is about 1364.4376379897.

The spelling of 2540159999 in words is "two billion, five hundred forty million, one hundred fifty-nine thousand, nine hundred ninety-nine".