6445757148 has 12 divisors (see below), whose sum is σ = 15040100040. Its totient is φ = 2148585712.

The previous prime is 6445757137. The next prime is 6445757191. The reversal of 6445757148 is 8417575446.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 6445757148.

It is a congruent number.

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, 268573203 + ... + 268573226.

It is an arithmetic number, because the mean of its divisors is an integer number (1253341670).

Almost surely, 2^6445757148 is an apocalyptic number.

It is an amenable number.

6445757148 is an abundant number, since it is smaller than the sum of its proper divisors (8594342892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6445757148 is a wasteful number, since it uses less digits than its factorization.

6445757148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537146436 (or 537146434 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 51.

The square root of 6445757148 is about 80285.4728328855. The cubic root of 6445757148 is about 1861.0497358065.

The spelling of 6445757148 in words is "six billion, four hundred forty-five million, seven hundred fifty-seven thousand, one hundred forty-eight".