6545253664 has 24 divisors (see below), whose sum is σ = 13030759980. Its totient is φ = 3235854336.

The previous prime is 6545253619. The next prime is 6545253683. The reversal of 6545253664 is 4663525456.

It can be written as a sum of positive squares in 2 ways, for example, as 5313243664 + 1232010000 = 72892^2 + 35100^2 .

It is a super-2 number, since 2×6545253664² = 85680691052210849792, which contains 22 as substring.

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, 1146249 + ... + 1151944.

Almost surely, 2^6545253664 is an apocalyptic number.

It is an amenable number.

6545253664 is a deficient number, since it is larger than the sum of its proper divisors (6485506316).

6545253664 is a wasteful number, since it uses less digits than its factorization.

6545253664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2298292 (or 2298284 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 46.

The square root of 6545253664 is about 80902.7420054475. The cubic root of 6545253664 is about 1870.5765867627.

The spelling of 6545253664 in words is "six billion, five hundred forty-five million, two hundred fifty-three thousand, six hundred sixty-four".