2543126644 has 24 divisors (see below), whose sum is σ = 4467556800. Its totient is φ = 1266693120.

The previous prime is 2543126617. The next prime is 2543126657. The reversal of 2543126644 is 4466213452.

It is a congruent number.

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, 1804212 + ... + 1805620.

It is an arithmetic number, because the mean of its divisors is an integer number (186148200).

Almost surely, 2^2543126644 is an apocalyptic number.

It is an amenable number.

2543126644 is a deficient number, since it is larger than the sum of its proper divisors (1924430156).

2543126644 is a wasteful number, since it uses less digits than its factorization.

2543126644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823 (or 2821 counting only the distinct ones).

The product of its digits is 138240, while the sum is 37.

The square root of 2543126644 is about 50429.4224039895. The cubic root of 2543126644 is about 1364.9686055028.

The spelling of 2543126644 in words is "two billion, five hundred forty-three million, one hundred twenty-six thousand, six hundred forty-four".