185239141081921 has 8 divisors (see below), whose sum is σ = 185294460710304. Its totient is φ = 185183823555360.

The previous prime is 185239141081837. The next prime is 185239141081933. The reversal of 185239141081921 is 129180141932581.

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 185239141081921 - 2⁹ = 185239141081409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (185239141082921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185572926 + ... + 186568456.

It is an arithmetic number, because the mean of its divisors is an integer number (23161807588788).

Almost surely, 2^{185239141081921} is an apocalyptic number.

It is an amenable number.

185239141081921 is a deficient number, since it is larger than the sum of its proper divisors (55319628383).

185239141081921 is an equidigital number, since it uses as much as digits as its factorization.

185239141081921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050911.

The product of its (nonzero) digits is 1244160, while the sum is 55.

The spelling of 185239141081921 in words is "one hundred eighty-five trillion, two hundred thirty-nine billion, one hundred forty-one million, eighty-one thousand, nine hundred twenty-one".