181030223023240 has 128 divisors (see below), whose sum is σ = 439913564006400. Its totient is φ = 66840355563520.

The previous prime is 181030223023189. The next prime is 181030223023261. The reversal of 181030223023240 is 42320322030181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49265385 + ... + 52812295.

It is an arithmetic number, because the mean of its divisors is an integer number (3436824718800).

Almost surely, 2^{181030223023240} is an apocalyptic number.

181030223023240 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 181030223023240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219956782003200).

181030223023240 is an abundant number, since it is smaller than the sum of its proper divisors (258883340983160).

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

181030223023240 is a wasteful number, since it uses less digits than its factorization.

181030223023240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3548887 (or 3548883 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 181030223023240 in words is "one hundred eighty-one trillion, thirty billion, two hundred twenty-three million, twenty-three thousand, two hundred forty".