164949855 has 16 divisors (see below), whose sum is σ = 301622784. Its totient is φ = 75405600.

The previous prime is 164949839. The next prime is 164949857. The reversal of 164949855 is 558949461.

It is not a de Polignac number, because 164949855 - 2⁴ = 164949839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164949798 and 164949807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164949857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 785371 + ... + 785580.

It is an arithmetic number, because the mean of its divisors is an integer number (18851424).

Almost surely, 2^164949855 is an apocalyptic number.

164949855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

164949855 is a deficient number, since it is larger than the sum of its proper divisors (136672929).

164949855 is a wasteful number, since it uses less digits than its factorization.

164949855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570966.

The product of its digits is 1555200, while the sum is 51.

The square root of 164949855 is about 12843.2805388654. The cubic root of 164949855 is about 548.4250868612.

The spelling of 164949855 in words is "one hundred sixty-four million, nine hundred forty-nine thousand, eight hundred fifty-five".