164401705 has 16 divisors (see below), whose sum is σ = 213482304. Its totient is φ = 120818880.

The previous prime is 164401691. The next prime is 164401709. The reversal of 164401705 is 507104461.

It is not a de Polignac number, because 164401705 - 2¹¹ = 164399657 is a prime.

It is a super-3 number, since 3×164401705³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164401709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7722 + ... + 19708.

It is an arithmetic number, because the mean of its divisors is an integer number (13342644).

Almost surely, 2^164401705 is an apocalyptic number.

It is an amenable number.

164401705 is a deficient number, since it is larger than the sum of its proper divisors (49080599).

164401705 is a wasteful number, since it uses less digits than its factorization.

164401705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12216.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 164401705 is about 12821.9228277197. The cubic root of 164401705 is about 547.8169165246.

It can be divided in two parts, 16440 and 1705, that added together give a triangular number (18145 = T₁₉₀).

The spelling of 164401705 in words is "one hundred sixty-four million, four hundred one thousand, seven hundred five".