6345255645 has 24 divisors (see below), whose sum is σ = 11002465656. Its totient is φ = 3382898688.

The previous prime is 6345255643. The next prime is 6345255647. The reversal of 6345255645 is 5465525436.

6345255645 is a `hidden beast` number, since 6 + 3 + 4 + 52 + 556 + 45 = 666.

It is an interprime number because it is at equal distance from previous prime (6345255643) and next prime (6345255647).

It can be written as a sum of positive squares in 4 ways, for example, as 280428516 + 6064827129 = 16746^2 + 77877^2 .

It is not a de Polignac number, because 6345255645 - 2¹ = 6345255643 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6345255645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6345255643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106029 + ... + 154701.

It is an arithmetic number, because the mean of its divisors is an integer number (458436069).

Almost surely, 2^6345255645 is an apocalyptic number.

It is an amenable number.

6345255645 is a deficient number, since it is larger than the sum of its proper divisors (4657210011).

6345255645 is a wasteful number, since it uses less digits than its factorization.

6345255645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51581 (or 51578 counting only the distinct ones).

The product of its digits is 2160000, while the sum is 45.

The square root of 6345255645 is about 79657.1129592330. The cubic root of 6345255645 is about 1851.3266009629.

The spelling of 6345255645 in words is "six billion, three hundred forty-five million, two hundred fifty-five thousand, six hundred forty-five".