195065640 has 384 divisors, whose sum is σ = 819486720. Its totient is φ = 39052800.

The previous prime is 195065639. The next prime is 195065653. The reversal of 195065640 is 46560591.

195065640 is a `hidden beast` number, since 1 + 9 + 5 + 0 + 6 + 5 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 195065595 and 195065604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 859207 + ... + 859433.

It is an arithmetic number, because the mean of its divisors is an integer number (2134080).

Almost surely, 2^195065640 is an apocalyptic number.

195065640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195065640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409743360).

195065640 is an abundant number, since it is smaller than the sum of its proper divisors (624421080).

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

195065640 is a wasteful number, since it uses less digits than its factorization.

195065640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 195065640 is about 13966.5901350330. The cubic root of 195065640 is about 579.9540589850.

The spelling of 195065640 in words is "one hundred ninety-five million, sixty-five thousand, six hundred forty".