644404423660114 has 32 divisors (see below), whose sum is σ = 1105523883063936. Its totient is φ = 279076596860160.

The previous prime is 644404423660057. The next prime is 644404423660159. The reversal of 644404423660114 is 411066324404446.

It is a happy number.

It is a super-2 number, since 2×644404423660114² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2202162702 + ... + 2202455305.

It is an arithmetic number, because the mean of its divisors is an integer number (34547621345748).

Almost surely, 2^{644404423660114} is an apocalyptic number.

644404423660114 is a deficient number, since it is larger than the sum of its proper divisors (461119459403822).

644404423660114 is a wasteful number, since it uses less digits than its factorization.

644404423660114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4404618370.

The product of its (nonzero) digits is 5308416, while the sum is 49.

The spelling of 644404423660114 in words is "six hundred forty-four trillion, four hundred four billion, four hundred twenty-three million, six hundred sixty thousand, one hundred fourteen".