13186633640 has 16 divisors (see below), whose sum is σ = 29669925780. Its totient is φ = 5274653440.

The previous prime is 13186633633. The next prime is 13186633643. The reversal of 13186633640 is 4633668131.

13186633640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11638525924 + 1548107716 = 107882^2 + 39346^2 .

It is not an unprimeable number, because it can be changed into a prime (13186633643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164832881 + ... + 164832960.

Almost surely, 2^13186633640 is an apocalyptic number.

13186633640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13186633640 is an abundant number, since it is smaller than the sum of its proper divisors (16483292140).

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

13186633640 is a wasteful number, since it uses less digits than its factorization.

13186633640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329665852 (or 329665848 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 13186633640 in words is "thirteen billion, one hundred eighty-six million, six hundred thirty-three thousand, six hundred forty".