164220749 has 16 divisors (see below), whose sum is σ = 205111680. Its totient is φ = 127733760.

The previous prime is 164220739. The next prime is 164220761. The reversal of 164220749 is 947022461.

It is not a de Polignac number, because 164220749 - 2¹² = 164216653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164220739) 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, 50237 + ... + 53405.

It is an arithmetic number, because the mean of its divisors is an integer number (12819480).

Almost surely, 2^164220749 is an apocalyptic number.

It is an amenable number.

164220749 is a deficient number, since it is larger than the sum of its proper divisors (40890931).

164220749 is a wasteful number, since it uses less digits than its factorization.

164220749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3860.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 164220749 is about 12814.8643769647. The cubic root of 164220749 is about 547.6158497715.

The spelling of 164220749 in words is "one hundred sixty-four million, two hundred twenty thousand, seven hundred forty-nine".