1101321648 has 180 divisors, whose sum is σ = 3616554240. Its totient is φ = 311931648.

The previous prime is 1101321647. The next prime is 1101321653. The reversal of 1101321648 is 8461231011.

It is a happy number.

1101321648 is a `hidden beast` number, since 1 + 1 + 0 + 13 + 2 + 1 + 648 = 666.

It is not an unprimeable number, because it can be changed into a prime (1101321647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 895498 + ... + 896726.

It is an arithmetic number, because the mean of its divisors is an integer number (20091968).

Almost surely, 2^1101321648 is an apocalyptic number.

1101321648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1101321648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1808277120).

1101321648 is an abundant number, since it is smaller than the sum of its proper divisors (2515232592).

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

1101321648 is a wasteful number, since it uses less digits than its factorization.

1101321648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384 (or 1368 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1101321648 is about 33186.1665155830. The cubic root of 1101321648 is about 1032.6933775499.

Adding to 1101321648 its reverse (8461231011), we get a palindrome (9562552659).

The spelling of 1101321648 in words is "one billion, one hundred one million, three hundred twenty-one thousand, six hundred forty-eight".