195836538240 has 768 divisors, whose sum is σ = 815330880000. Its totient is φ = 43989516288.

The previous prime is 195836538221. The next prime is 195836538251. The reversal of 195836538240 is 42835638591.

195836538240 is a `hidden beast` number, since 1 + 9 + 5 + 8 + 365 + 38 + 240 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 64228236 + ... + 64231284.

It is an arithmetic number, because the mean of its divisors is an integer number (1061628750).

Almost surely, 2^195836538240 is an apocalyptic number.

195836538240 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 195836538240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (407665440000).

195836538240 is an abundant number, since it is smaller than the sum of its proper divisors (619494341760).

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

195836538240 is an equidigital number, since it uses as much as digits as its factorization.

195836538240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3149 (or 3125 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 195836538240 in words is "one hundred ninety-five billion, eight hundred thirty-six million, five hundred thirty-eight thousand, two hundred forty".