64444600644446 has 48 divisors (see below), whose sum is σ = 112546184964192. Its totient is φ = 27559525002240.

The previous prime is 64444600644443. The next prime is 64444600644449.

64444600644446 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (64444600644443) and next prime (64444600644449).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64444600644391 and 64444600644400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64444600644443) 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, 8014406 + ... + 13896758.

It is an arithmetic number, because the mean of its divisors is an integer number (2344712186754).

Almost surely, 2^{64444600644446} is an apocalyptic number.

64444600644446 is a deficient number, since it is larger than the sum of its proper divisors (48101584319746).

64444600644446 is a wasteful number, since it uses less digits than its factorization.

64444600644446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5885057 (or 5885046 counting only the distinct ones).

The product of its (nonzero) digits is 84934656, while the sum is 56.

It can be divided in two parts, 64444600 and 644446, that multiplied together give a square (41531064691600 = 6444460²).

The spelling of 64444600644446 in words is "sixty-four trillion, four hundred forty-four billion, six hundred million, six hundred forty-four thousand, four hundred forty-six".