181494441947 has 48 divisors (see below), whose sum is σ = 229225500000. Its totient is φ = 142428948480.

The previous prime is 181494441941. The next prime is 181494442001. The reversal of 181494441947 is 749144494181.

It is not a de Polignac number, because 181494441947 - 2¹⁶ = 181494376411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 181494441892 and 181494441901.

It is not an unprimeable number, because it can be changed into a prime (181494441941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118545572 + ... + 118547102.

It is an arithmetic number, because the mean of its divisors is an integer number (4775531250).

Almost surely, 2^181494441947 is an apocalyptic number.

181494441947 is a deficient number, since it is larger than the sum of its proper divisors (47731058053).

181494441947 is a wasteful number, since it uses less digits than its factorization.

181494441947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2956 (or 2949 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 56.

The spelling of 181494441947 in words is "one hundred eighty-one billion, four hundred ninety-four million, four hundred forty-one thousand, nine hundred forty-seven".