164576493449 has 4 divisors (see below), whose sum is σ = 166830966036. Its totient is φ = 162322020864.

The previous prime is 164576493443. The next prime is 164576493461. The reversal of 164576493449 is 944394675461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944394675461 = 19 ⋅49704982919.

It can be written as a sum of positive squares in 2 ways, for example, as 91207020025 + 73369473424 = 302005^2 + 270868^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164576493449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164576493391 and 164576493400.

It is not an unprimeable number, because it can be changed into a prime (164576493443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127236184 + ... + 1127236329.

It is an arithmetic number, because the mean of its divisors is an integer number (41707741509).

Almost surely, 2^164576493449 is an apocalyptic number.

It is an amenable number.

164576493449 is a deficient number, since it is larger than the sum of its proper divisors (2254472587).

164576493449 is an equidigital number, since it uses as much as digits as its factorization.

164576493449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2254472586.

The product of its digits is 78382080, while the sum is 62.

The spelling of 164576493449 in words is "one hundred sixty-four billion, five hundred seventy-six million, four hundred ninety-three thousand, four hundred forty-nine".