2543745456 has 60 divisors (see below), whose sum is σ = 8135950992. Its totient is φ = 726784128.

The previous prime is 2543745443. The next prime is 2543745487. The reversal of 2543745456 is 6545473452.

2543745456 is a `hidden beast` number, since 2 + 543 + 7 + 4 + 54 + 56 = 666.

It is a super-3 number, since 3×2543745456³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1260771 + ... + 1262786.

Almost surely, 2^2543745456 is an apocalyptic number.

It is an amenable number.

2543745456 is an abundant number, since it is smaller than the sum of its proper divisors (5592205536).

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

2543745456 is a wasteful number, since it uses less digits than its factorization.

2543745456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523578 (or 2523569 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 45.

The square root of 2543745456 is about 50435.5574570164. The cubic root of 2543745456 is about 1365.0793078744.

The spelling of 2543745456 in words is "two billion, five hundred forty-three million, seven hundred forty-five thousand, four hundred fifty-six".