164344785 has 32 divisors (see below), whose sum is σ = 292284288. Its totient is φ = 78174720.

The previous prime is 164344783. The next prime is 164344793. The reversal of 164344785 is 587443461.

It is not a de Polignac number, because 164344785 - 2¹ = 164344783 is a prime.

It is a super-3 number, since 3×164344785³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (164344781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 652 + ... + 18141.

It is an arithmetic number, because the mean of its divisors is an integer number (9133884).

Almost surely, 2^164344785 is an apocalyptic number.

164344785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164344785 is a deficient number, since it is larger than the sum of its proper divisors (127939503).

164344785 is a wasteful number, since it uses less digits than its factorization.

164344785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18865.

The product of its digits is 322560, while the sum is 42.

The square root of 164344785 is about 12819.7029996798. The cubic root of 164344785 is about 547.7536865676.

The spelling of 164344785 in words is "one hundred sixty-four million, three hundred forty-four thousand, seven hundred eighty-five".