44644321646 has 4 divisors (see below), whose sum is σ = 66966482472. Its totient is φ = 22322160822.

The previous prime is 44644321621. The next prime is 44644321661. The reversal of 44644321646 is 64612344644.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 44644321597 and 44644321606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11161080410 + ... + 11161080413.

It is an arithmetic number, because the mean of its divisors is an integer number (16741620618).

Almost surely, 2^44644321646 is an apocalyptic number.

44644321646 is a deficient number, since it is larger than the sum of its proper divisors (22322160826).

44644321646 is a wasteful number, since it uses less digits than its factorization.

44644321646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22322160825.

The product of its digits is 1327104, while the sum is 44.

The spelling of 44644321646 in words is "forty-four billion, six hundred forty-four million, three hundred twenty-one thousand, six hundred forty-six".