164023641 has 6 divisors (see below), whose sum is σ = 236923050. Its totient is φ = 109349088.

The previous prime is 164023621. The next prime is 164023663. The reversal of 164023641 is 146320461.

164023641 is a `hidden beast` number, since 16 + 4 + 0 + 2 + 3 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 163942416 + 81225 = 12804^2 + 285^2 .

It is not a de Polignac number, because 164023641 - 2⁹ = 164023129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164023621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9112416 + ... + 9112433.

It is an arithmetic number, because the mean of its divisors is an integer number (39487175).

Almost surely, 2^164023641 is an apocalyptic number.

It is an amenable number.

164023641 is a deficient number, since it is larger than the sum of its proper divisors (72899409).

164023641 is a wasteful number, since it uses less digits than its factorization.

164023641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18224855 (or 18224852 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 164023641 is about 12807.1714675802. The cubic root of 164023641 is about 547.3966678073.

It can be divided in two parts, 1640 and 23641, that added together give a square (25281 = 159²).

The spelling of 164023641 in words is "one hundred sixty-four million, twenty-three thousand, six hundred forty-one".