11566987950 has 48 divisors (see below), whose sum is σ = 32784151680. Its totient is φ = 2643882720.

The previous prime is 11566987931. The next prime is 11566987963. The reversal of 11566987950 is 5978966511.

It is a super-3 number, since 3×11566987950³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5507040 + ... + 5509139.

It is an arithmetic number, because the mean of its divisors is an integer number (683003160).

Almost surely, 2^11566987950 is an apocalyptic number.

11566987950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11566987950 is an abundant number, since it is smaller than the sum of its proper divisors (21217163730).

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

11566987950 is a wasteful number, since it uses less digits than its factorization.

11566987950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11016201 (or 11016196 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 57.

The spelling of 11566987950 in words is "eleven billion, five hundred sixty-six million, nine hundred eighty-seven thousand, nine hundred fifty".