181426145544 has 128 divisors (see below), whose sum is σ = 585718272000. Its totient is φ = 50957439552.

The previous prime is 181426145521. The next prime is 181426145597. The reversal of 181426145544 is 445541624181.

181426145544 is a `hidden beast` number, since 1 + 8 + 1 + 4 + 2 + 61 + 45 + 544 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 181426145544.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 927664 + ... + 1106079.

It is an arithmetic number, because the mean of its divisors is an integer number (4575924000).

Almost surely, 2^181426145544 is an apocalyptic number.

181426145544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

181426145544 is an abundant number, since it is smaller than the sum of its proper divisors (404292126456).

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

181426145544 is a wasteful number, since it uses less digits than its factorization.

181426145544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033824 (or 2033814 counting only the distinct ones).

The product of its digits is 614400, while the sum is 45.

The spelling of 181426145544 in words is "one hundred eighty-one billion, four hundred twenty-six million, one hundred forty-five thousand, five hundred forty-four".