11717727840 has 768 divisors, whose sum is σ = 51778621440. Its totient is φ = 2408693760.

The previous prime is 11717727817. The next prime is 11717727841. The reversal of 11717727840 is 4872771711.

11717727840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11717727840² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11717727841) 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 127 ways as a sum of consecutive naturals, for example, 16117557 + ... + 16118283.

It is an arithmetic number, because the mean of its divisors is an integer number (67420080).

Almost surely, 2^11717727840 is an apocalyptic number.

11717727840 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 11717727840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25889310720).

11717727840 is an abundant number, since it is smaller than the sum of its proper divisors (40060893600).

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

11717727840 is a wasteful number, since it uses less digits than its factorization.

11717727840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 153664, while the sum is 45.

The spelling of 11717727840 in words is "eleven billion, seven hundred seventeen million, seven hundred twenty-seven thousand, eight hundred forty".