13640533650 has 120 divisors (see below), whose sum is σ = 37947141540. Its totient is φ = 3632999040.

The previous prime is 13640533649. The next prime is 13640533651. The reversal of 13640533650 is 5633504631.

13640533650 is a `hidden beast` number, since 1 + 3 + 64 + 0 + 533 + 65 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (13640533649) and next prime (13640533651).

It can be written as a sum of positive squares in 6 ways, for example, as 3207749769 + 10432783881 = 56637^2 + 102141^2 .

It is not an unprimeable number, because it can be changed into a prime (13640533651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4489932 + ... + 4492968.

Almost surely, 2^13640533650 is an apocalyptic number.

13640533650 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 13640533650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18973570770).

13640533650 is an abundant number, since it is smaller than the sum of its proper divisors (24306607890).

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

13640533650 is a wasteful number, since it uses less digits than its factorization.

13640533650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4170 (or 4156 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 36.

The spelling of 13640533650 in words is "thirteen billion, six hundred forty million, five hundred thirty-three thousand, six hundred fifty".