1108721664 has 180 divisors, whose sum is σ = 3278272816. Its totient is φ = 360972288.

The previous prime is 1108721659. The next prime is 1108721671. The reversal of 1108721664 is 4661278011.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10764237 + ... + 10764339.

Almost surely, 2^1108721664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1108721664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1639136408).

1108721664 is an abundant number, since it is smaller than the sum of its proper divisors (2169551152).

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

1108721664 is an equidigital number, since it uses as much as digits as its factorization.

1108721664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1108721664 is about 33297.4723365003. The cubic root of 1108721664 is about 1035.0011790227.

Adding to 1108721664 its reverse (4661278011), we get a palindrome (5769999675).

The spelling of 1108721664 in words is "one billion, one hundred eight million, seven hundred twenty-one thousand, six hundred sixty-four".