195106989870 has 240 divisors, whose sum is σ = 581953114512. Its totient is φ = 46853614080.

The previous prime is 195106989863. The next prime is 195106989871. The reversal of 195106989870 is 78989601591.

It is a super-2 number, since 2×195106989870² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 195106989798 and 195106989807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195106989871) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 5595109 + ... + 5629871.

Almost surely, 2^195106989870 is an apocalyptic number.

195106989870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 195106989870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290976557256).

195106989870 is an abundant number, since it is smaller than the sum of its proper divisors (386846124642).

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

195106989870 is a wasteful number, since it uses less digits than its factorization.

195106989870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34849 (or 34827 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 63.

The spelling of 195106989870 in words is "one hundred ninety-five billion, one hundred six million, nine hundred eighty-nine thousand, eight hundred seventy".