164638085074 has 4 divisors (see below), whose sum is σ = 246957127614. Its totient is φ = 82319042536.

The previous prime is 164638085033. The next prime is 164638085077. The reversal of 164638085074 is 470580836461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 103031370225 + 61606714849 = 320985^2 + 248207^2 .

It is not an unprimeable number, because it can be changed into a prime (164638085077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41159521267 + ... + 41159521270.

Almost surely, 2^164638085074 is an apocalyptic number.

164638085074 is a deficient number, since it is larger than the sum of its proper divisors (82319042540).

164638085074 is an equidigital number, since it uses as much as digits as its factorization.

164638085074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82319042539.

The product of its (nonzero) digits is 3870720, while the sum is 52.

The spelling of 164638085074 in words is "one hundred sixty-four billion, six hundred thirty-eight million, eighty-five thousand, seventy-four".