164564340 has 24 divisors (see below), whose sum is σ = 460780320. Its totient is φ = 43883808.

The previous prime is 164564321. The next prime is 164564359. The reversal of 164564340 is 43465461.

It is an interprime number because it is at equal distance from previous prime (164564321) and next prime (164564359).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1371310 + ... + 1371429.

It is an arithmetic number, because the mean of its divisors is an integer number (19199180).

Almost surely, 2^164564340 is an apocalyptic number.

164564340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164564340 is an abundant number, since it is smaller than the sum of its proper divisors (296215980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164564340 is a wasteful number, since it uses less digits than its factorization.

164564340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742751 (or 2742749 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 164564340 is about 12828.2633275124. The cubic root of 164564340 is about 547.9975002994.

The spelling of 164564340 in words is "one hundred sixty-four million, five hundred sixty-four thousand, three hundred forty".