164635745 has 8 divisors (see below), whose sum is σ = 197639784. Its totient is φ = 131657344.

The previous prime is 164635721. The next prime is 164635819. The reversal of 164635745 is 547536461.

It can be written as a sum of positive squares in 4 ways, for example, as 4157521 + 160478224 = 2039^2 + 12668^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164635745 - 2⁸ = 164635489 is a prime.

It is a super-3 number, since 3×164635745³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian 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, 13157 + ... + 22413.

It is an arithmetic number, because the mean of its divisors is an integer number (24704973).

Almost surely, 2^164635745 is an apocalyptic number.

It is an amenable number.

164635745 is a deficient number, since it is larger than the sum of its proper divisors (33004039).

164635745 is an equidigital number, since it uses as much as digits as its factorization.

164635745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12819.

The product of its digits is 302400, while the sum is 41.

The square root of 164635745 is about 12831.0461381760. The cubic root of 164635745 is about 548.0767481351.

The spelling of 164635745 in words is "one hundred sixty-four million, six hundred thirty-five thousand, seven hundred forty-five".