164422641 has 4 divisors (see below), whose sum is σ = 219230192. Its totient is φ = 109615092.

The previous prime is 164422631. The next prime is 164422651. The reversal of 164422641 is 146224461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146224461 = 3 ⋅48741487.

It is an interprime number because it is at equal distance from previous prime (164422631) and next prime (164422651).

It is not a de Polignac number, because 164422641 - 2¹⁰ = 164421617 is a prime.

It is a super-3 number, since 3×164422641³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164422599 and 164422608.

It is not an unprimeable number, because it can be changed into a prime (164422631) 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, 27403771 + ... + 27403776.

It is an arithmetic number, because the mean of its divisors is an integer number (54807548).

Almost surely, 2^164422641 is an apocalyptic number.

It is an amenable number.

164422641 is a deficient number, since it is larger than the sum of its proper divisors (54807551).

164422641 is an equidigital number, since it uses as much as digits as its factorization.

164422641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54807550.

The product of its digits is 9216, while the sum is 30.

The square root of 164422641 is about 12822.7392159398. The cubic root of 164422641 is about 547.8401697468.

The spelling of 164422641 in words is "one hundred sixty-four million, four hundred twenty-two thousand, six hundred forty-one".