11511331040 has 96 divisors (see below), whose sum is σ = 31413088224. Its totient is φ = 3939696640.

The previous prime is 11511331003. The next prime is 11511331043. The reversal of 11511331040 is 4013311511.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11511331043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162449 + ... + 222288.

It is an arithmetic number, because the mean of its divisors is an integer number (327219669).

Almost surely, 2^11511331040 is an apocalyptic number.

11511331040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11511331040 is an abundant number, since it is smaller than the sum of its proper divisors (19901757184).

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

11511331040 is a wasteful number, since it uses less digits than its factorization.

11511331040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384780 (or 384772 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 11511331040 its reverse (4013311511), we get a palindrome (15524642551).

The spelling of 11511331040 in words is "eleven billion, five hundred eleven million, three hundred thirty-one thousand, forty".