164902505 has 8 divisors (see below), whose sum is σ = 198207432. Its totient is φ = 131705728.

The previous prime is 164902489. The next prime is 164902537. The reversal of 164902505 is 505209461.

It is a happy number.

164902505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 755161 + 164147344 = 869^2 + 12812^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 164902505 - 2⁴ = 164902489 is a prime.

It is a Duffinian 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, 23642 + ... + 29811.

It is an arithmetic number, because the mean of its divisors is an integer number (24775929).

Almost surely, 2^164902505 is an apocalyptic number.

It is an amenable number.

164902505 is a deficient number, since it is larger than the sum of its proper divisors (33304927).

164902505 is an equidigital number, since it uses as much as digits as its factorization.

164902505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54075.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 164902505 is about 12841.4370301770. The cubic root of 164902505 is about 548.3726054308.

The spelling of 164902505 in words is "one hundred sixty-four million, nine hundred two thousand, five hundred five".