4401091644 has 12 divisors (see below), whose sum is σ = 10269213864. Its totient is φ = 1467030544.

The previous prime is 4401091621. The next prime is 4401091661. The reversal of 4401091644 is 4461901044.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183378807 + ... + 183378830.

It is an arithmetic number, because the mean of its divisors is an integer number (855767822).

Almost surely, 2^4401091644 is an apocalyptic number.

It is an amenable number.

4401091644 is an abundant number, since it is smaller than the sum of its proper divisors (5868122220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4401091644 is a wasteful number, since it uses less digits than its factorization.

4401091644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366757644 (or 366757642 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 4401091644 is about 66340.7238730480. The cubic root of 4401091644 is about 1638.7780462303.

Adding to 4401091644 its reverse (4461901044), we get a palindrome (8862992688).

The spelling of 4401091644 in words is "four billion, four hundred one million, ninety-one thousand, six hundred forty-four".