11661505050 has 96 divisors (see below), whose sum is σ = 31584228480. Its totient is φ = 2830060800.

The previous prime is 11661505049. The next prime is 11661505069. The reversal of 11661505050 is 5050516611.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11661504999 and 11661505017.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 96336 + ... + 180564.

It is an arithmetic number, because the mean of its divisors is an integer number (329002380).

Almost surely, 2^11661505050 is an apocalyptic number.

11661505050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11661505050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15792114240).

11661505050 is an abundant number, since it is smaller than the sum of its proper divisors (19922723430).

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

11661505050 is a wasteful number, since it uses less digits than its factorization.

11661505050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84328 (or 84323 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 11661505050 in words is "eleven billion, six hundred sixty-one million, five hundred five thousand, fifty".