181143856663660 has 24 divisors (see below), whose sum is σ = 414984107993616. Its totient is φ = 65870493332160.

The previous prime is 181143856663619. The next prime is 181143856663681. The reversal of 181143856663660 is 66366658341181.

It is a junction number, because it is equal to n+sod(n) for n = 181143856663592 and 181143856663601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411690583107 + ... + 411690583546.

It is an arithmetic number, because the mean of its divisors is an integer number (17291004499734).

Almost surely, 2^{181143856663660} is an apocalyptic number.

181143856663660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181143856663660 is an abundant number, since it is smaller than the sum of its proper divisors (233840251329956).

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

181143856663660 is a wasteful number, since it uses less digits than its factorization.

181143856663660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823381166673 (or 823381166671 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 64.

The spelling of 181143856663660 in words is "one hundred eighty-one trillion, one hundred forty-three billion, eight hundred fifty-six million, six hundred sixty-three thousand, six hundred sixty".