164402365 has 8 divisors (see below), whose sum is σ = 197354808. Its totient is φ = 131473920.

The previous prime is 164402353. The next prime is 164402377. The reversal of 164402365 is 563204461.

It is an interprime number because it is at equal distance from previous prime (164402353) and next prime (164402377).

It can be written as a sum of positive squares in 4 ways, for example, as 118135161 + 46267204 = 10869^2 + 6802^2 .

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

It is not a de Polignac number, because 164402365 - 2¹¹ = 164400317 is a prime.

It is a super-3 number, since 3×164402365³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17329 + ... + 25081.

It is an arithmetic number, because the mean of its divisors is an integer number (24669351).

Almost surely, 2^164402365 is an apocalyptic number.

It is an amenable number.

164402365 is a deficient number, since it is larger than the sum of its proper divisors (32952443).

164402365 is an equidigital number, since it uses as much as digits as its factorization.

164402365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11999.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 164402365 is about 12821.9485648633. The cubic root of 164402365 is about 547.8176496043.

The spelling of 164402365 in words is "one hundred sixty-four million, four hundred two thousand, three hundred sixty-five".