181225959593 has 8 divisors (see below), whose sum is σ = 209442522240. Its totient is φ = 153591181920.

The previous prime is 181225959583. The next prime is 181225959617. The reversal of 181225959593 is 395959522181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 181225959593 - 2²⁰ = 181224911017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (181225959553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145445573 + ... + 145446818.

It is an arithmetic number, because the mean of its divisors is an integer number (26180315280).

Almost surely, 2^181225959593 is an apocalyptic number.

It is an amenable number.

181225959593 is a deficient number, since it is larger than the sum of its proper divisors (28216562647).

181225959593 is an equidigital number, since it uses as much as digits as its factorization.

181225959593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290892487.

The product of its digits is 8748000, while the sum is 59.

The spelling of 181225959593 in words is "one hundred eighty-one billion, two hundred twenty-five million, nine hundred fifty-nine thousand, five hundred ninety-three".