164420045 has 32 divisors (see below), whose sum is σ = 212012640. Its totient is φ = 122204160.

The previous prime is 164420041. The next prime is 164420057. The reversal of 164420045 is 540024461.

It can be written as a sum of positive squares in 16 ways, for example, as 4169764 + 160250281 = 2042^2 + 12659^2 .

It is not a de Polignac number, because 164420045 - 2² = 164420041 is a prime.

It is a super-3 number, since 3×164420045³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 164419996 and 164420023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164420041) 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, 401801 + ... + 402209.

It is an arithmetic number, because the mean of its divisors is an integer number (6625395).

Almost surely, 2^164420045 is an apocalyptic number.

It is an amenable number.

164420045 is a deficient number, since it is larger than the sum of its proper divisors (47592595).

164420045 is a wasteful number, since it uses less digits than its factorization.

164420045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 164420045 is about 12822.6379891191. The cubic root of 164420045 is about 547.8372865255.

The spelling of 164420045 in words is "one hundred sixty-four million, four hundred twenty thousand, forty-five".