164648445 has 16 divisors (see below), whose sum is σ = 283702272. Its totient is φ = 81057600.

The previous prime is 164648401. The next prime is 164648447. The reversal of 164648445 is 544846461.

It is a happy number.

It is not a de Polignac number, because 164648445 - 2⁹ = 164647933 is a prime.

It is a super-2 number, since 2×164648445² = 54218220881836050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164648397 and 164648406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164648447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421981 + ... + 422370.

It is an arithmetic number, because the mean of its divisors is an integer number (17731392).

Almost surely, 2^164648445 is an apocalyptic number.

164648445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164648445 is a deficient number, since it is larger than the sum of its proper divisors (119053827).

164648445 is a wasteful number, since it uses less digits than its factorization.

164648445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844372.

The product of its digits is 368640, while the sum is 42.

The square root of 164648445 is about 12831.5410220285. The cubic root of 164648445 is about 548.0908406514.

The spelling of 164648445 in words is "one hundred sixty-four million, six hundred forty-eight thousand, four hundred forty-five".