164586544513 has 4 divisors (see below), whose sum is σ = 166435831620. Its totient is φ = 162737257408.

The previous prime is 164586544511. The next prime is 164586544517. The reversal of 164586544513 is 315445685461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315445685461 = 10709 ⋅29456129.

It can be written as a sum of positive squares in 2 ways, for example, as 72029434689 + 92557109824 = 268383^2 + 304232^2 .

It is a cyclic number.

It is not a de Polignac number, because 164586544513 - 2¹ = 164586544511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164586544511) 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, 924643420 + ... + 924643597.

It is an arithmetic number, because the mean of its divisors is an integer number (41608957905).

Almost surely, 2^164586544513 is an apocalyptic number.

It is an amenable number.

164586544513 is a deficient number, since it is larger than the sum of its proper divisors (1849287107).

164586544513 is an equidigital number, since it uses as much as digits as its factorization.

164586544513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849287106.

The product of its digits is 6912000, while the sum is 52.

The spelling of 164586544513 in words is "one hundred sixty-four billion, five hundred eighty-six million, five hundred forty-four thousand, five hundred thirteen".