11551532342440 has 16 divisors (see below), whose sum is σ = 25990947770580. Its totient is φ = 4620612936960.

The previous prime is 11551532342431. The next prime is 11551532342447. The reversal of 11551532342440 is 4424323515511.

It can be written as a sum of positive squares in 2 ways, for example, as 11169378411844 + 382153930596 = 3342062^2 + 618186^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 288788308561 = 11551532342440 / (1 + 1 + 5 + 5 + 1 + 5 + 3 + 2 + 3 + 4 + 2 + 4 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 11551532342393 and 11551532342402.

It is not an unprimeable number, because it can be changed into a prime (11551532342447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144394154241 + ... + 144394154320.

Almost surely, 2^{11551532342440} is an apocalyptic number.

11551532342440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11551532342440 is an abundant number, since it is smaller than the sum of its proper divisors (14439415428140).

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

11551532342440 is a wasteful number, since it uses less digits than its factorization.

11551532342440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288788308572 (or 288788308568 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 11551532342440 its reverse (4424323515511), we get a palindrome (15975855857951).

The spelling of 11551532342440 in words is "eleven trillion, five hundred fifty-one billion, five hundred thirty-two million, three hundred forty-two thousand, four hundred forty".