13644652154220 has 72 divisors (see below), whose sum is σ = 41511593751264. Its totient is φ = 3627776936448.

The previous prime is 13644652154201. The next prime is 13644652154327. The reversal of 13644652154220 is 2245125644631.

It is a happy number.

13644652154220 is a `hidden beast` number, since 1 + 3 + 6 + 4 + 4 + 6 + 5 + 215 + 422 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112407624 + ... + 112528943.

It is an arithmetic number, because the mean of its divisors is an integer number (576549913212).

Almost surely, 2^{13644652154220} is an apocalyptic number.

13644652154220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13644652154220 is an abundant number, since it is smaller than the sum of its proper divisors (27866941597044).

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

13644652154220 is a wasteful number, since it uses less digits than its factorization.

13644652154220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224936919 (or 224936914 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

Adding to 13644652154220 its reverse (2245125644631), we get a palindrome (15889777798851).

The spelling of 13644652154220 in words is "thirteen trillion, six hundred forty-four billion, six hundred fifty-two million, one hundred fifty-four thousand, two hundred twenty".