11401237440 has 168 divisors, whose sum is σ = 40050354240. Its totient is φ = 2975606784.

The previous prime is 11401237423. The next prime is 11401237453. The reversal of 11401237440 is 4473210411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93246 + ... + 177474.

Almost surely, 2^11401237440 is an apocalyptic number.

11401237440 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 11401237440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20025177120).

11401237440 is an abundant number, since it is smaller than the sum of its proper divisors (28649116800).

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

11401237440 is a wasteful number, since it uses less digits than its factorization.

11401237440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84299 (or 84286 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

Adding to 11401237440 its reverse (4473210411), we get a palindrome (15874447851).

The spelling of 11401237440 in words is "eleven billion, four hundred one million, two hundred thirty-seven thousand, four hundred forty".