1109396651840 has 224 divisors, whose sum is σ = 2772076020480. Its totient is φ = 422345097216.

The previous prime is 1109396651819. The next prime is 1109396651849. The reversal of 1109396651840 is 481566939011.

It is a Cunningham number, because it is equal to 1053279²-1.

It is a super-2 number, since 2×1109396651840² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109396651849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 216973124 + ... + 216978236.

Almost surely, 2^{1109396651840} is an apocalyptic number.

1109396651840 is a gapful number since it is divisible by the number (10) 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 1109396651840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1386038010240).

1109396651840 is an abundant number, since it is smaller than the sum of its proper divisors (1662679368640).

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

1109396651840 is a wasteful number, since it uses less digits than its factorization.

1109396651840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5489 (or 5479 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 1109396651840 in words is "one trillion, one hundred nine billion, three hundred ninety-six million, six hundred fifty-one thousand, eight hundred forty".