13185748944 has 100 divisors (see below), whose sum is σ = 38225150656. Its totient is φ = 4388136768.

The previous prime is 13185748943. The next prime is 13185748973. The reversal of 13185748944 is 44984758131.

13185748944 is a `hidden beast` number, since 13 + 18 + 574 + 8 + 9 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13185748943) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 825417 + ... + 841239.

Almost surely, 2^13185748944 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 13185748944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19112575328).

13185748944 is an abundant number, since it is smaller than the sum of its proper divisors (25039401712).

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

13185748944 is a wasteful number, since it uses less digits than its factorization.

13185748944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16486 (or 16471 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

It can be divided in two parts, 13185 and 748944, that added together give a square (762129 = 873²).

The spelling of 13185748944 in words is "thirteen billion, one hundred eighty-five million, seven hundred forty-eight thousand, nine hundred forty-four".