11522115550 has 24 divisors (see below), whose sum is σ = 23379421032. Its totient is φ = 4189860000.

The previous prime is 11522115509. The next prime is 11522115589. The reversal of 11522115550 is 5551122511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10474101 + ... + 10475200.

It is an arithmetic number, because the mean of its divisors is an integer number (974142543).

Almost surely, 2^11522115550 is an apocalyptic number.

11522115550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11522115550 is an abundant number, since it is smaller than the sum of its proper divisors (11857305482).

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

11522115550 is a wasteful number, since it uses less digits than its factorization.

11522115550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20949324 (or 20949319 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 28.

The spelling of 11522115550 in words is "eleven billion, five hundred twenty-two million, one hundred fifteen thousand, five hundred fifty".