13644645456 has 80 divisors (see below), whose sum is σ = 38351614784. Its totient is φ = 4155052032.

The previous prime is 13644645439. The next prime is 13644645467. The reversal of 13644645456 is 65454644631.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 52186 + ... + 173241.

Almost surely, 2^13644645456 is an apocalyptic number.

13644645456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13644645456 is an abundant number, since it is smaller than the sum of its proper divisors (24706969328).

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

13644645456 is a wasteful number, since it uses less digits than its factorization.

13644645456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225548 (or 225542 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 48.

The spelling of 13644645456 in words is "thirteen billion, six hundred forty-four million, six hundred forty-five thousand, four hundred fifty-six".