195669864 has 128 divisors (see below), whose sum is σ = 619920000. Its totient is φ = 56650752.

The previous prime is 195669841. The next prime is 195669871. The reversal of 195669864 is 468966591.

It is a happy number.

195669864 is a `hidden beast` number, since 19 + 566 + 9 + 8 + 64 = 666.

It is a super-3 number, since 3×195669864³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 195669864.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45687 + ... + 49785.

It is an arithmetic number, because the mean of its divisors is an integer number (4843125).

Almost surely, 2^195669864 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 195669864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309960000).

195669864 is an abundant number, since it is smaller than the sum of its proper divisors (424250136).

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

195669864 is a wasteful number, since it uses less digits than its factorization.

195669864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144 (or 4134 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 195669864 is about 13988.2044594723. The cubic root of 195669864 is about 580.5522524391.

The spelling of 195669864 in words is "one hundred ninety-five million, six hundred sixty-nine thousand, eight hundred sixty-four".