164635740 has 60 divisors (see below), whose sum is σ = 516473496. Its totient is φ = 43902432.

The previous prime is 164635721. The next prime is 164635819. The reversal of 164635740 is 47536461.

It is a happy number.

164635740 is a `hidden beast` number, since 1 + 646 + 3 + 5 + 7 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 164635695 and 164635704.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49194 + ... + 52433.

Almost surely, 2^164635740 is an apocalyptic number.

164635740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164635740 is an abundant number, since it is smaller than the sum of its proper divisors (351837756).

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

164635740 is a wasteful number, since it uses less digits than its factorization.

164635740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101648 (or 101637 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 164635740 is about 12831.0459433360. The cubic root of 164635740 is about 548.0767425868.

The spelling of 164635740 in words is "one hundred sixty-four million, six hundred thirty-five thousand, seven hundred forty".