64643463 has 24 divisors (see below), whose sum is σ = 96911360. Its totient is φ = 41478480.

The previous prime is 64643461. The next prime is 64643473. The reversal of 64643463 is 36434646.

64643463 is a `hidden beast` number, since 6 + 4 + 643 + 4 + 6 + 3 = 666.

It is not a de Polignac number, because 64643463 - 2¹ = 64643461 is a prime.

It is a Duffinian number.

Its product of digits (124416) is a multiple of the sum of its prime divisors (1296).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64643461) 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, 61698 + ... + 62736.

Almost surely, 2^64643463 is an apocalyptic number.

64643463 is a deficient number, since it is larger than the sum of its proper divisors (32267897).

64643463 is a wasteful number, since it uses less digits than its factorization.

64643463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299 (or 1296 counting only the distinct ones).

The product of its digits is 124416, while the sum is 36.

The square root of 64643463 is about 8040.1158573742. The cubic root of 64643463 is about 401.3360801722.

The spelling of 64643463 in words is "sixty-four million, six hundred forty-three thousand, four hundred sixty-three".