181445189013 has 12 divisors (see below), whose sum is σ = 285913631328. Its totient is φ = 109966781160.

The previous prime is 181445189011. The next prime is 181445189027. The reversal of 181445189013 is 310981544181.

181445189013 is a `hidden beast` number, since 1 + 8 + 1 + 44 + 518 + 90 + 1 + 3 = 666.

It is not a de Polignac number, because 181445189013 - 2¹ = 181445189011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 181445189013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181445189011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 916389745 + ... + 916389942.

It is an arithmetic number, because the mean of its divisors is an integer number (23826135944).

Almost surely, 2^181445189013 is an apocalyptic number.

It is an amenable number.

181445189013 is a deficient number, since it is larger than the sum of its proper divisors (104468442315).

181445189013 is a wasteful number, since it uses less digits than its factorization.

181445189013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832779704 (or 1832779701 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 181445189013 in words is "one hundred eighty-one billion, four hundred forty-five million, one hundred eighty-nine thousand, thirteen".