185129475979 has 6 divisors (see below), whose sum is σ = 215354696604. Its totient is φ = 158682407940.

The previous prime is 185129475977. The next prime is 185129475991. The reversal of 185129475979 is 979574921581.

It is not a de Polignac number, because 185129475979 - 2¹ = 185129475977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (185129475977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1889076237 + ... + 1889076334.

It is an arithmetic number, because the mean of its divisors is an integer number (35892449434).

Almost surely, 2^185129475979 is an apocalyptic number.

185129475979 is a deficient number, since it is larger than the sum of its proper divisors (30225220625).

185129475979 is an equidigital number, since it uses as much as digits as its factorization.

185129475979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3778152585 (or 3778152578 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 67.

The spelling of 185129475979 in words is "one hundred eighty-five billion, one hundred twenty-nine million, four hundred seventy-five thousand, nine hundred seventy-nine".