6445463355 has 32 divisors (see below), whose sum is σ = 11596677120. Its totient is φ = 3396157920.

The previous prime is 6445463333. The next prime is 6445463357. The reversal of 6445463355 is 5533645446.

6445463355 is a `hidden beast` number, since 6 + 4 + 4 + 5 + 4 + 633 + 5 + 5 = 666.

It is not a de Polignac number, because 6445463355 - 2⁸ = 6445463099 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 6445463355.

It is not an unprimeable number, because it can be changed into a prime (6445463357) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276411 + ... + 298820.

It is an arithmetic number, because the mean of its divisors is an integer number (362396160).

Almost surely, 2^6445463355 is an apocalyptic number.

6445463355 is a deficient number, since it is larger than the sum of its proper divisors (5151213765).

6445463355 is a wasteful number, since it uses less digits than its factorization.

6445463355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575328 (or 575322 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 45.

The square root of 6445463355 is about 80283.6431348254. The cubic root of 6445463355 is about 1861.0214602717.

The spelling of 6445463355 in words is "six billion, four hundred forty-five million, four hundred sixty-three thousand, three hundred fifty-five".