2543265840 has 40 divisors (see below), whose sum is σ = 7884124848. Its totient is φ = 678204160.

The previous prime is 2543265827. The next prime is 2543265853. The reversal of 2543265840 is 485623452.

It is an interprime number because it is at equal distance from previous prime (2543265827) and next prime (2543265853).

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×2543265840² = 12936402265821811200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5298231 + ... + 5298710.

Almost surely, 2^2543265840 is an apocalyptic number.

2543265840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2543265840 is an abundant number, since it is smaller than the sum of its proper divisors (5340859008).

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

2543265840 is a wasteful number, since it uses less digits than its factorization.

2543265840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10596957 (or 10596951 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 39.

The square root of 2543265840 is about 50430.8024921278. The cubic root of 2543265840 is about 1364.9935085363.

The spelling of 2543265840 in words is "two billion, five hundred forty-three million, two hundred sixty-five thousand, eight hundred forty".