2543251664 has 10 divisors (see below), whose sum is σ = 4927550130. Its totient is φ = 1271625824.

The previous prime is 2543251651. The next prime is 2543251729. The reversal of 2543251664 is 4661523452.

2543251664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1434894400 + 1108357264 = 37880^2 + 33292^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79476599 + ... + 79476630.

It is an arithmetic number, because the mean of its divisors is an integer number (492755013).

Almost surely, 2^2543251664 is an apocalyptic number.

It is an amenable number.

2543251664 is a deficient number, since it is larger than the sum of its proper divisors (2384298466).

2543251664 is a wasteful number, since it uses less digits than its factorization.

2543251664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158953237 (or 158953231 counting only the distinct ones).

The product of its digits is 172800, while the sum is 38.

The square root of 2543251664 is about 50430.6619429093. The cubic root of 2543251664 is about 1364.9909724029.

The spelling of 2543251664 in words is "two billion, five hundred forty-three million, two hundred fifty-one thousand, six hundred sixty-four".