44644321645 has 24 divisors (see below), whose sum is σ = 67985271648. Its totient is φ = 27830224800.

The previous prime is 44644321621. The next prime is 44644321661. The reversal of 44644321645 is 54612344644.

It is not a de Polignac number, because 44644321645 - 2¹³ = 44644313453 is a prime.

It is a super-3 number, since 3×44644321645³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8280111 + ... + 8285500.

It is an arithmetic number, because the mean of its divisors is an integer number (2832719652).

Almost surely, 2^44644321645 is an apocalyptic number.

It is an amenable number.

44644321645 is a deficient number, since it is larger than the sum of its proper divisors (23340950003).

44644321645 is a wasteful number, since it uses less digits than its factorization.

44644321645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16565641 (or 16565634 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 43.

The spelling of 44644321645 in words is "forty-four billion, six hundred forty-four million, three hundred twenty-one thousand, six hundred forty-five".