8181437748 has 72 divisors (see below), whose sum is σ = 22217622336. Its totient is φ = 2333379840.

The previous prime is 8181437729. The next prime is 8181437749. The reversal of 8181437748 is 8477341818.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 8181437748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8181437749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141040 + ... + 190407.

It is an arithmetic number, because the mean of its divisors is an integer number (308578088).

Almost surely, 2^8181437748 is an apocalyptic number.

It is an amenable number.

8181437748 is an abundant number, since it is smaller than the sum of its proper divisors (14036184588).

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

8181437748 is a wasteful number, since it uses less digits than its factorization.

8181437748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331493 (or 331480 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 51.

The square root of 8181437748 is about 90451.3004218292. The cubic root of 8181437748 is about 2015.0069267680.

The spelling of 8181437748 in words is "eight billion, one hundred eighty-one million, four hundred thirty-seven thousand, seven hundred forty-eight".