64441863 has 12 divisors (see below), whose sum is σ = 97982040. Its totient is φ = 40700016.

The previous prime is 64441859. The next prime is 64441877. The reversal of 64441863 is 36814446.

64441863 is a `hidden beast` number, since 644 + 4 + 1 + 8 + 6 + 3 = 666.

It is not a de Polignac number, because 64441863 - 2² = 64441859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64441843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188256 + ... + 188597.

It is an arithmetic number, because the mean of its divisors is an integer number (8165170).

Almost surely, 2^64441863 is an apocalyptic number.

64441863 is a deficient number, since it is larger than the sum of its proper divisors (33540177).

64441863 is a wasteful number, since it uses less digits than its factorization.

64441863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376878 (or 376875 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 64441863 is about 8027.5689346153. The cubic root of 64441863 is about 400.9184374841.

The spelling of 64441863 in words is "sixty-four million, four hundred forty-one thousand, eight hundred sixty-three".