2543957745 has 24 divisors (see below), whose sum is σ = 4734877824. Its totient is φ = 1162951776.

The previous prime is 2543957699. The next prime is 2543957753. The reversal of 2543957745 is 5477593452.

It is not a de Polignac number, because 2543957745 - 2⁷ = 2543957617 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, 1729849 + ... + 1731318.

It is an arithmetic number, because the mean of its divisors is an integer number (197286576).

Almost surely, 2^2543957745 is an apocalyptic number.

It is an amenable number.

2543957745 is a deficient number, since it is larger than the sum of its proper divisors (2190920079).

2543957745 is a wasteful number, since it uses less digits than its factorization.

2543957745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3461189 (or 3461182 counting only the distinct ones).

The product of its digits is 5292000, while the sum is 51.

The square root of 2543957745 is about 50437.6619700002. The cubic root of 2543957745 is about 1365.1172811786.

The spelling of 2543957745 in words is "two billion, five hundred forty-three million, nine hundred fifty-seven thousand, seven hundred forty-five".