2547645728 has 24 divisors (see below), whose sum is σ = 5021413488. Its totient is φ = 1272366144.

The previous prime is 2547645719. The next prime is 2547645731. The reversal of 2547645728 is 8275467452.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16826 + ... + 73337.

It is an arithmetic number, because the mean of its divisors is an integer number (209225562).

Almost surely, 2^2547645728 is an apocalyptic number.

It is an amenable number.

2547645728 is a deficient number, since it is larger than the sum of its proper divisors (2473767760).

2547645728 is an equidigital number, since it uses as much as digits as its factorization.

2547645728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91056 (or 91048 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 50.

The square root of 2547645728 is about 50474.2085425814. The cubic root of 2547645728 is about 1365.7766341672.

The spelling of 2547645728 in words is "two billion, five hundred forty-seven million, six hundred forty-five thousand, seven hundred twenty-eight".