11555202040 has 64 divisors (see below), whose sum is σ = 26629378560. Its totient is φ = 4510970880.

The previous prime is 11555202011. The next prime is 11555202053. The reversal of 11555202040 is 4020255511.

It is a junction number, because it is equal to n+sod(n) for n = 11555201996 and 11555202014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390652 + ... + 419188.

It is an arithmetic number, because the mean of its divisors is an integer number (416084040).

Almost surely, 2^11555202040 is an apocalyptic number.

11555202040 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 11555202040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13314689280).

11555202040 is an abundant number, since it is smaller than the sum of its proper divisors (15074176520).

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

11555202040 is a wasteful number, since it uses less digits than its factorization.

11555202040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28792 (or 28788 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 11555202040 its reverse (4020255511), we get a palindrome (15575457551).

The spelling of 11555202040 in words is "eleven billion, five hundred fifty-five million, two hundred two thousand, forty".