164892638906 has 4 divisors (see below), whose sum is σ = 247338958362. Its totient is φ = 82446319452.

The previous prime is 164892638753. The next prime is 164892638927. The reversal of 164892638906 is 609836298461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 609836298461 = 13 ⋅46910484497.

It can be written as a sum of positive squares in only one way, i.e., 160072808281 + 4819830625 = 400091^2 + 69425^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41223159725 + ... + 41223159728.

Almost surely, 2^164892638906 is an apocalyptic number.

164892638906 is a deficient number, since it is larger than the sum of its proper divisors (82446319456).

164892638906 is an equidigital number, since it uses as much as digits as its factorization.

164892638906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82446319455.

The product of its (nonzero) digits is 26873856, while the sum is 62.

The spelling of 164892638906 in words is "one hundred sixty-four billion, eight hundred ninety-two million, six hundred thirty-eight thousand, nine hundred six".