181340442157644 has 108 divisors (see below), whose sum is σ = 581702457373128. Its totient is φ = 47101413542400.

The previous prime is 181340442157631. The next prime is 181340442157657. The reversal of 181340442157644 is 446751244043181.

181340442157644 is a `hidden beast` number, since 1 + 8 + 1 + 3 + 4 + 0 + 4 + 4 + 21 + 576 + 44 = 666.

181340442157644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (181340442157631) and next prime (181340442157657).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4672739877 + ... + 4672778684.

It is an arithmetic number, because the mean of its divisors is an integer number (5386133864566).

Almost surely, 2^{181340442157644} is an apocalyptic number.

181340442157644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

181340442157644 is an abundant number, since it is smaller than the sum of its proper divisors (400362015215484).

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

181340442157644 is a wasteful number, since it uses less digits than its factorization.

181340442157644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9345518596 (or 9345518584 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 54.

The spelling of 181340442157644 in words is "one hundred eighty-one trillion, three hundred forty billion, four hundred forty-two million, one hundred fifty-seven thousand, six hundred forty-four".