13650401205 has 64 divisors (see below), whose sum is σ = 27936852480. Its totient is φ = 6194575872.

The previous prime is 13650401203. The next prime is 13650401227. The reversal of 13650401205 is 50210405631.

13650401205 is a `hidden beast` number, since 1 + 3 + 6 + 50 + 401 + 205 = 666.

It is not a de Polignac number, because 13650401205 - 2¹ = 13650401203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13650401203) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76747 + ... + 182183.

It is an arithmetic number, because the mean of its divisors is an integer number (436513320).

Almost surely, 2^13650401205 is an apocalyptic number.

13650401205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13650401205 is an abundant number, since it is smaller than the sum of its proper divisors (14286451275).

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

13650401205 is a wasteful number, since it uses less digits than its factorization.

13650401205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105595 (or 105589 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 13650401205 its reverse (50210405631), we get a palindrome (63860806836).

The spelling of 13650401205 in words is "thirteen billion, six hundred fifty million, four hundred one thousand, two hundred five".