189320479172 has 12 divisors (see below), whose sum is σ = 361430005776. Its totient is φ = 86054763240.

The previous prime is 189320479171. The next prime is 189320479181. The reversal of 189320479172 is 271974023981.

It is not an unprimeable number, because it can be changed into a prime (189320479171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2151369038 + ... + 2151369125.

It is an arithmetic number, because the mean of its divisors is an integer number (30119167148).

Almost surely, 2^189320479172 is an apocalyptic number.

It is an amenable number.

189320479172 is a deficient number, since it is larger than the sum of its proper divisors (172109526604).

189320479172 is a wasteful number, since it uses less digits than its factorization.

189320479172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4302738178 (or 4302738176 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 53.

The spelling of 189320479172 in words is "one hundred eighty-nine billion, three hundred twenty million, four hundred seventy-nine thousand, one hundred seventy-two".