13661704924 has 48 divisors (see below), whose sum is σ = 27977517568. Its totient is φ = 5715033408.

The previous prime is 13661704921. The next prime is 13661704949. The reversal of 13661704924 is 42940716631.

13661704924 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13661704921) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2469049 + ... + 2474575.

Almost surely, 2^13661704924 is an apocalyptic number.

13661704924 is a gapful number since it is divisible by the number (14) 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 13661704924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13988758784).

13661704924 is an abundant number, since it is smaller than the sum of its proper divisors (14315812644).

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

13661704924 is a wasteful number, since it uses less digits than its factorization.

13661704924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7634 (or 7632 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 13661704924 in words is "thirteen billion, six hundred sixty-one million, seven hundred four thousand, nine hundred twenty-four".