181031116944 has 160 divisors (see below), whose sum is σ = 525463511040. Its totient is φ = 53403682816.

The previous prime is 181031116933. The next prime is 181031116949. The reversal of 181031116944 is 449611130181.

It is not an unprimeable number, because it can be changed into a prime (181031116949) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1025569 + ... + 1189055.

It is an arithmetic number, because the mean of its divisors is an integer number (3284146944).

Almost surely, 2^181031116944 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 181031116944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262731755520).

181031116944 is an abundant number, since it is smaller than the sum of its proper divisors (344432394096).

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

181031116944 is a wasteful number, since it uses less digits than its factorization.

181031116944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163597 (or 163591 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The spelling of 181031116944 in words is "one hundred eighty-one billion, thirty-one million, one hundred sixteen thousand, nine hundred forty-four".