2547658664 has 16 divisors (see below), whose sum is σ = 4984549920. Its totient is φ = 1218445360.

The previous prime is 2547658649. The next prime is 2547658667. The reversal of 2547658664 is 4668567452.

It is not an unprimeable number, because it can be changed into a prime (2547658667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6922802 + ... + 6923169.

It is an arithmetic number, because the mean of its divisors is an integer number (311534370).

Almost surely, 2^2547658664 is an apocalyptic number.

It is an amenable number.

2547658664 is a deficient number, since it is larger than the sum of its proper divisors (2436891256).

2547658664 is a wasteful number, since it uses less digits than its factorization.

2547658664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13846000 (or 13845996 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 53.

The square root of 2547658664 is about 50474.3366870730. The cubic root of 2547658664 is about 1365.7789457990.

The spelling of 2547658664 in words is "two billion, five hundred forty-seven million, six hundred fifty-eight thousand, six hundred sixty-four".