13444957620 has 144 divisors (see below), whose sum is σ = 43255150848. Its totient is φ = 3368709120.

The previous prime is 13444957609. The next prime is 13444957627. The reversal of 13444957620 is 2675944431.

13444957620 is a `hidden beast` number, since 1 + 34 + 4 + 49 + 576 + 2 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13444957627) 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, 1976425 + ... + 1983215.

It is an arithmetic number, because the mean of its divisors is an integer number (300382992).

Almost surely, 2^13444957620 is an apocalyptic number.

13444957620 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 13444957620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21627575424).

13444957620 is an abundant number, since it is smaller than the sum of its proper divisors (29810193228).

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

13444957620 is a wasteful number, since it uses less digits than its factorization.

13444957620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7470 (or 7465 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 13444957620 in words is "thirteen billion, four hundred forty-four million, nine hundred fifty-seven thousand, six hundred twenty".