11401163520 has 144 divisors (see below), whose sum is σ = 37010152032. Its totient is φ = 2990407680.

The previous prime is 11401163497. The next prime is 11401163531. The reversal of 11401163520 is 2536110411.

It is a happy number.

11401163520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 209904 + ... + 258576.

Almost surely, 2^11401163520 is an apocalyptic number.

11401163520 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 11401163520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18505076016).

11401163520 is an abundant number, since it is smaller than the sum of its proper divisors (25608988512).

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

11401163520 is an equidigital number, since it uses as much as digits as its factorization.

11401163520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48758 (or 48744 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 11401163520 its reverse (2536110411), we get a palindrome (13937273931).

The spelling of 11401163520 in words is "eleven billion, four hundred one million, one hundred sixty-three thousand, five hundred twenty".