2540690805 has 16 divisors (see below), whose sum is σ = 4067458560. Its totient is φ = 1354250688.

The previous prime is 2540690771. The next prime is 2540690857. The reversal of 2540690805 is 5080960452.

It is not a de Polignac number, because 2540690805 - 2⁸ = 2540690549 is a prime.

It is a super-2 number, since 2×2540690805² = 12910219533223096050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21762 + ... + 74531.

It is an arithmetic number, because the mean of its divisors is an integer number (254216160).

Almost surely, 2^2540690805 is an apocalyptic number.

It is an amenable number.

2540690805 is a deficient number, since it is larger than the sum of its proper divisors (1526767755).

2540690805 is a wasteful number, since it uses less digits than its factorization.

2540690805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98060.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 2540690805 is about 50405.2656475492. The cubic root of 2540690805 is about 1364.5326715365.

The spelling of 2540690805 in words is "two billion, five hundred forty million, six hundred ninety thousand, eight hundred five".