11643264450 has 72 divisors (see below), whose sum is σ = 31319870400. Its totient is φ = 3101069280.

The previous prime is 11643264449. The next prime is 11643264461. The reversal of 11643264450 is 5446234611.

11643264450 is a `hidden beast` number, since 1 + 1 + 6 + 4 + 3 + 2 + 644 + 5 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 362131 + ... + 392969.

It is an arithmetic number, because the mean of its divisors is an integer number (434998200).

Almost surely, 2^11643264450 is an apocalyptic number.

11643264450 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 11643264450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15659935200).

11643264450 is an abundant number, since it is smaller than the sum of its proper divisors (19676605950).

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

11643264450 is a wasteful number, since it uses less digits than its factorization.

11643264450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31696 (or 31688 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 11643264450 in words is "eleven billion, six hundred forty-three million, two hundred sixty-four thousand, four hundred fifty".