164613641 has 2 divisors, whose sum is σ = 164613642. Its totient is φ = 164613640.

The previous prime is 164613637. The next prime is 164613661. The reversal of 164613641 is 146316461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161391616 + 3222025 = 12704^2 + 1795^2 .

It is a cyclic number.

It is not a de Polignac number, because 164613641 - 2² = 164613637 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 164613598 and 164613607.

It is not a weakly prime, because it can be changed into another prime (164613611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82306820 + 82306821.

It is an arithmetic number, because the mean of its divisors is an integer number (82306821).

Almost surely, 2^164613641 is an apocalyptic number.

It is an amenable number.

164613641 is a deficient number, since it is larger than the sum of its proper divisors (1).

164613641 is an equidigital number, since it uses as much as digits as its factorization.

164613641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 164613641 is about 12830.1847609456. The cubic root of 164613641 is about 548.0522187705.

It can be divided in two parts, 16461 and 3641, that added together give a palindrome (20102).

The spelling of 164613641 in words is "one hundred sixty-four million, six hundred thirteen thousand, six hundred forty-one".