13644335146 has 16 divisors (see below), whose sum is σ = 22047263784. Its totient is φ = 6295552704.

The previous prime is 13644335129. The next prime is 13644335147. The reversal of 13644335146 is 64153344631.

It can be written as a sum of positive squares in 4 ways, for example, as 11483479921 + 2160855225 = 107161^2 + 46485^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13644335099 and 13644335108.

It is not an unprimeable number, because it can be changed into a prime (13644335147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16836 + ... + 166048.

Almost surely, 2^13644335146 is an apocalyptic number.

13644335146 is a deficient number, since it is larger than the sum of its proper divisors (8402928638).

13644335146 is a wasteful number, since it uses less digits than its factorization.

13644335146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152745.

The product of its digits is 311040, while the sum is 40.

Adding to 13644335146 its reverse (64153344631), we get a palindrome (77797679777).

The spelling of 13644335146 in words is "thirteen billion, six hundred forty-four million, three hundred thirty-five thousand, one hundred forty-six".