164588642938 has 4 divisors (see below), whose sum is σ = 246882964410. Its totient is φ = 82294321468.

The previous prime is 164588642923. The next prime is 164588642951. The reversal of 164588642938 is 839246885461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 839246885461 = 2551 ⋅328987411.

It can be written as a sum of positive squares in only one way, i.e., 107015999689 + 57572643249 = 327133^2 + 239943^2 .

It is a super-3 number, since 3×164588642938³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 164588642938.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41147160733 + ... + 41147160736.

Almost surely, 2^164588642938 is an apocalyptic number.

164588642938 is a deficient number, since it is larger than the sum of its proper divisors (82294321472).

164588642938 is an equidigital number, since it uses as much as digits as its factorization.

164588642938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82294321471.

The product of its digits is 79626240, while the sum is 64.

The spelling of 164588642938 in words is "one hundred sixty-four billion, five hundred eighty-eight million, six hundred forty-two thousand, nine hundred thirty-eight".