13552600644 has 144 divisors (see below), whose sum is σ = 38795440320. Its totient is φ = 4088304000.

The previous prime is 13552600643. The next prime is 13552600667. The reversal of 13552600644 is 44600625531.

13552600644 is a `hidden beast` number, since 1 + 3 + 5 + 5 + 2 + 6 + 0 + 0 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 13552600599 and 13552600608.

It is not an unprimeable number, because it can be changed into a prime (13552600643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3042619 + ... + 3047069.

It is an arithmetic number, because the mean of its divisors is an integer number (269412780).

Almost surely, 2^13552600644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13552600644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19397720160).

13552600644 is an abundant number, since it is smaller than the sum of its proper divisors (25242839676).

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

13552600644 is a wasteful number, since it uses less digits than its factorization.

13552600644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4719 (or 4700 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 13552600644 in words is "thirteen billion, five hundred fifty-two million, six hundred thousand, six hundred forty-four".