164256112442 has 4 divisors (see below), whose sum is σ = 246384168666. Its totient is φ = 82128056220.

The previous prime is 164256112421. The next prime is 164256112453. The reversal of 164256112442 is 244211652461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 164024190001 + 231922441 = 404999^2 + 15229^2 .

It is a junction number, because it is equal to n+sod(n) for n = 164256112396 and 164256112405.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 41064028109 + ... + 41064028112.

Almost surely, 2^164256112442 is an apocalyptic number.

164256112442 is a deficient number, since it is larger than the sum of its proper divisors (82128056224).

164256112442 is an equidigital number, since it uses as much as digits as its factorization.

164256112442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82128056223.

The product of its digits is 92160, while the sum is 38.

The spelling of 164256112442 in words is "one hundred sixty-four billion, two hundred fifty-six million, one hundred twelve thousand, four hundred forty-two".