2540686680 has 96 divisors (see below), whose sum is σ = 9436845600. Its totient is φ = 580727808.

The previous prime is 2540686679. The next prime is 2540686721. The reversal of 2540686680 is 866860452.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 501585 + ... + 506624.

It is an arithmetic number, because the mean of its divisors is an integer number (98300475).

Almost surely, 2^2540686680 is an apocalyptic number.

2540686680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2540686680 is an abundant number, since it is smaller than the sum of its proper divisors (6896158920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2540686680 is a wasteful number, since it uses less digits than its factorization.

2540686680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008233 (or 1008226 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 2540686680 is about 50405.2247291885. The cubic root of 2540686680 is about 1364.5319330628.

The spelling of 2540686680 in words is "two billion, five hundred forty million, six hundred eighty-six thousand, six hundred eighty".