195664448 has 84 divisors (see below), whose sum is σ = 462485232. Its totient is φ = 81849600.

The previous prime is 195664433. The next prime is 195664463. The reversal of 195664448 is 844466591.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (195664433) and next prime (195664463).

It is a super-2 number, since 2×195664448² = 76569152422289408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134123 + ... + 135573.

Almost surely, 2^195664448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195664448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231242616).

195664448 is an abundant number, since it is smaller than the sum of its proper divisors (266820784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195664448 is a wasteful number, since it uses less digits than its factorization.

195664448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520 (or 1503 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The square root of 195664448 is about 13988.0108664527. The cubic root of 195664448 is about 580.5468959679.

The spelling of 195664448 in words is "one hundred ninety-five million, six hundred sixty-four thousand, four hundred forty-eight".