11512513623540 has 192 divisors, whose sum is σ = 34584913440000. Its totient is φ = 2852469374976.

The previous prime is 11512513623539. The next prime is 11512513623557. The reversal of 11512513623540 is 4532631521511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 166059924 + ... + 166129236.

It is an arithmetic number, because the mean of its divisors is an integer number (180129757500).

Almost surely, 2^{11512513623540} is an apocalyptic number.

11512513623540 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 11512513623540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17292456720000).

11512513623540 is an abundant number, since it is smaller than the sum of its proper divisors (23072399816460).

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

11512513623540 is a wasteful number, since it uses less digits than its factorization.

11512513623540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72146 (or 72144 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 11512513623540 in words is "eleven trillion, five hundred twelve billion, five hundred thirteen million, six hundred twenty-three thousand, five hundred forty".