2540668117 has 8 divisors (see below), whose sum is σ = 2780959160. Its totient is φ = 2306784960.

The previous prime is 2540668111. The next prime is 2540668127. The reversal of 2540668117 is 7118660452.

It can be written as a sum of positive squares in 4 ways, for example, as 31259281 + 2509408836 = 5591^2 + 50094^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2540668117 - 2¹⁹ = 2540143829 is a prime.

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 2540668117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540668111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1601142 + ... + 1602727.

It is an arithmetic number, because the mean of its divisors is an integer number (347619895).

Almost surely, 2^2540668117 is an apocalyptic number.

It is an amenable number.

2540668117 is a deficient number, since it is larger than the sum of its proper divisors (240291043).

2540668117 is a wasteful number, since it uses less digits than its factorization.

2540668117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203943.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 2540668117 is about 50405.0405911948. The cubic root of 2540668117 is about 1364.5286098315.

The spelling of 2540668117 in words is "two billion, five hundred forty million, six hundred sixty-eight thousand, one hundred seventeen".