164540426 has 4 divisors (see below), whose sum is σ = 246810642. Its totient is φ = 82270212.

The previous prime is 164540419. The next prime is 164540449. The reversal of 164540426 is 624045461.

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., 162435025 + 2105401 = 12745^2 + 1451^2 .

It is a super-2 number, since 2×164540426² = 54147103576522952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164540392 and 164540401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41135105 + ... + 41135108.

Almost surely, 2^164540426 is an apocalyptic number.

164540426 is a deficient number, since it is larger than the sum of its proper divisors (82270216).

164540426 is an equidigital number, since it uses as much as digits as its factorization.

164540426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82270215.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 164540426 is about 12827.3312111288. The cubic root of 164540426 is about 547.9709545584.

Adding to 164540426 its reverse (624045461), we get a palindrome (788585887).

The spelling of 164540426 in words is "one hundred sixty-four million, five hundred forty thousand, four hundred twenty-six".