6644142363 has 16 divisors (see below), whose sum is σ = 9155763200. Its totient is φ = 4281323040.

The previous prime is 6644142359. The next prime is 6644142403. The reversal of 6644142363 is 3632414466.

It is not a de Polignac number, because 6644142363 - 2² = 6644142359 is a prime.

It is a super-2 number, since 2×6644142363² = 88289255479622447538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6644142763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34008 + ... + 120186.

It is an arithmetic number, because the mean of its divisors is an integer number (572235200).

Almost surely, 2^6644142363 is an apocalyptic number.

6644142363 is a deficient number, since it is larger than the sum of its proper divisors (2511620837).

6644142363 is a wasteful number, since it uses less digits than its factorization.

6644142363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87042.

The product of its digits is 248832, while the sum is 39.

The square root of 6644142363 is about 81511.6087621880. The cubic root of 6644142363 is about 1879.9500479975.

The spelling of 6644142363 in words is "six billion, six hundred forty-four million, one hundred forty-two thousand, three hundred sixty-three".