164861615 has 8 divisors (see below), whose sum is σ = 202659408. Its totient is φ = 128672320.

The previous prime is 164861611. The next prime is 164861633. The reversal of 164861615 is 516168461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 164861615 - 2² = 164861611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164861611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401897 + ... + 402306.

It is an arithmetic number, because the mean of its divisors is an integer number (25332426).

Almost surely, 2^164861615 is an apocalyptic number.

164861615 is a deficient number, since it is larger than the sum of its proper divisors (37797793).

164861615 is an equidigital number, since it uses as much as digits as its factorization.

164861615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804249.

The product of its digits is 34560, while the sum is 38.

The square root of 164861615 is about 12839.8448199345. The cubic root of 164861615 is about 548.3272760012.

The spelling of 164861615 in words is "one hundred sixty-four million, eight hundred sixty-one thousand, six hundred fifteen".