164995444253 has 4 divisors (see below), whose sum is σ = 164998921980. Its totient is φ = 164991966528.

The previous prime is 164995444223. The next prime is 164995444261. The reversal of 164995444253 is 352444599461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 352444599461 = 59 ⋅5973637279.

It can be written as a sum of positive squares in 2 ways, for example, as 137591290489 + 27404153764 = 370933^2 + 165542^2 .

It is a cyclic number.

It is not a de Polignac number, because 164995444253 - 2⁸ = 164995443997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164995444223) 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, 1666700 + ... + 1762917.

It is an arithmetic number, because the mean of its divisors is an integer number (41249730495).

Almost surely, 2^164995444253 is an apocalyptic number.

It is an amenable number.

164995444253 is a deficient number, since it is larger than the sum of its proper divisors (3477727).

164995444253 is an equidigital number, since it uses as much as digits as its factorization.

164995444253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3477726.

The product of its digits is 18662400, while the sum is 56.

The spelling of 164995444253 in words is "one hundred sixty-four billion, nine hundred ninety-five million, four hundred forty-four thousand, two hundred fifty-three".