11511625040 has 20 divisors (see below), whose sum is σ = 26764528404. Its totient is φ = 4604649984.

The previous prime is 11511625031. The next prime is 11511625043. The reversal of 11511625040 is 4052611511.

It can be written as a sum of positive squares in 2 ways, for example, as 3930788416 + 7580836624 = 62696^2 + 87068^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×11511625040² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11511625043) 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, 71947577 + ... + 71947736.

Almost surely, 2^11511625040 is an apocalyptic number.

11511625040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11511625040 is an abundant number, since it is smaller than the sum of its proper divisors (15252903364).

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

11511625040 is a wasteful number, since it uses less digits than its factorization.

11511625040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143895326 (or 143895320 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

The spelling of 11511625040 in words is "eleven billion, five hundred eleven million, six hundred twenty-five thousand, forty".