164442356250401 has 4 divisors (see below), whose sum is σ = 164442392298372. Its totient is φ = 164442320202432.

The previous prime is 164442356250323. The next prime is 164442356250409. The reversal of 164442356250401 is 104052653244461.

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

It can be written as a sum of positive squares in 2 ways, for example, as 134106220019776 + 30336136230625 = 11580424^2 + 5507825^2 .

It is a cyclic number.

It is not a de Polignac number, because 164442356250401 - 2¹⁴ = 164442356234017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164442356250409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9986660 + ... + 20703093.

It is an arithmetic number, because the mean of its divisors is an integer number (41110598074593).

Almost surely, 2^{164442356250401} is an apocalyptic number.

It is an amenable number.

164442356250401 is a deficient number, since it is larger than the sum of its proper divisors (36047971).

164442356250401 is an equidigital number, since it uses as much as digits as its factorization.

164442356250401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36047970.

The product of its (nonzero) digits is 2764800, while the sum is 47.

The spelling of 164442356250401 in words is "one hundred sixty-four trillion, four hundred forty-two billion, three hundred fifty-six million, two hundred fifty thousand, four hundred one".