181361398467 has 16 divisors (see below), whose sum is σ = 242097620000. Its totient is φ = 120766464000.

The previous prime is 181361398453. The next prime is 181361398507. The reversal of 181361398467 is 764893163181.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-181361398467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181363398467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12586467 + ... + 12600867.

It is an arithmetic number, because the mean of its divisors is an integer number (15131101250).

Almost surely, 2^181361398467 is an apocalyptic number.

181361398467 is a deficient number, since it is larger than the sum of its proper divisors (60736221533).

181361398467 is a wasteful number, since it uses less digits than its factorization.

181361398467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19014.

The product of its digits is 5225472, while the sum is 57.

The spelling of 181361398467 in words is "one hundred eighty-one billion, three hundred sixty-one million, three hundred ninety-eight thousand, four hundred sixty-seven".