13026442644 has 108 divisors (see below), whose sum is σ = 35041379100. Its totient is φ = 4079425536.

The previous prime is 13026442577. The next prime is 13026442687. The reversal of 13026442644 is 44624462031.

13026442644 is a `hidden beast` number, since 1 + 3 + 0 + 2 + 6 + 4 + 4 + 2 + 644 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 983575044 + 12042867600 = 31362^2 + 109740^2 .

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 = 13026442599 and 13026442608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11537472 + ... + 11538600.

Almost surely, 2^13026442644 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 13026442644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17520689550).

13026442644 is an abundant number, since it is smaller than the sum of its proper divisors (22014936456).

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

13026442644 is a wasteful number, since it uses less digits than its factorization.

13026442644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2282 (or 2260 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The spelling of 13026442644 in words is "thirteen billion, twenty-six million, four hundred forty-two thousand, six hundred forty-four".