13664629440 has 672 divisors, whose sum is σ = 60002781696. Its totient is φ = 2771435520.

The previous prime is 13664629439. The next prime is 13664629471. The reversal of 13664629440 is 4492646631.

13664629440 is a `hidden beast` number, since 1 + 3 + 66 + 462 + 94 + 40 = 666.

13664629440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (672).

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

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 9534964 + ... + 9536396.

Almost surely, 2^13664629440 is an apocalyptic number.

13664629440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13664629440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30001390848).

13664629440 is an abundant number, since it is smaller than the sum of its proper divisors (46338152256).

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

13664629440 is a wasteful number, since it uses less digits than its factorization.

13664629440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517 (or 1504 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 13664629440 in words is "thirteen billion, six hundred sixty-four million, six hundred twenty-nine thousand, four hundred forty".