11581328650 has 24 divisors (see below), whose sum is σ = 21610122444. Its totient is φ = 4617724800.

The previous prime is 11581328641. The next prime is 11581328651. The reversal of 11581328650 is 5682318511.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2289718201 + 9291610449 = 47851^2 + 96393^2 .

It is not an unprimeable number, because it can be changed into a prime (11581328651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 354361 + ... + 385660.

Almost surely, 2^11581328650 is an apocalyptic number.

11581328650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11581328650 is a deficient number, since it is larger than the sum of its proper divisors (10028793794).

11581328650 is a wasteful number, since it uses less digits than its factorization.

11581328650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740346 (or 740341 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 40.

The spelling of 11581328650 in words is "eleven billion, five hundred eighty-one million, three hundred twenty-eight thousand, six hundred fifty".