2540111985 has 24 divisors (see below), whose sum is σ = 4412701800. Its totient is φ = 1351698432.

The previous prime is 2540111969. The next prime is 2540112013. The reversal of 2540111985 is 5891110452.

It can be written as a sum of positive squares in 4 ways, for example, as 437981184 + 2102130801 = 20928^2 + 45849^2 .

It is not a de Polignac number, because 2540111985 - 2⁴ = 2540111969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42654 + ... + 83063.

It is an arithmetic number, because the mean of its divisors is an integer number (183862575).

Almost surely, 2^2540111985 is an apocalyptic number.

It is an amenable number.

2540111985 is a deficient number, since it is larger than the sum of its proper divisors (1872589815).

2540111985 is a wasteful number, since it uses less digits than its factorization.

2540111985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126177 (or 126174 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 2540111985 is about 50399.5236584633. The cubic root of 2540111985 is about 1364.4290410874.

The spelling of 2540111985 in words is "two billion, five hundred forty million, one hundred eleven thousand, nine hundred eighty-five".