181382084440 has 32 divisors (see below), whose sum is σ = 415809877680. Its totient is φ = 71183911552.

The previous prime is 181382084423. The next prime is 181382084441. The reversal of 181382084440 is 44480283181.

It is a super-2 number, since 2×181382084440² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181382084441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42776674 + ... + 42780913.

Almost surely, 2^181382084440 is an apocalyptic number.

181382084440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181382084440 is an abundant number, since it is smaller than the sum of its proper divisors (234427793240).

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

181382084440 is a wasteful number, since it uses less digits than its factorization.

181382084440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85557651 (or 85557647 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 43.

The spelling of 181382084440 in words is "one hundred eighty-one billion, three hundred eighty-two million, eighty-four thousand, four hundred forty".