195661508712 has 32 divisors (see below), whose sum is σ = 492436692000. Its totient is φ = 64782780224.

The previous prime is 195661508699. The next prime is 195661508719. The reversal of 195661508712 is 217805166591.

It is not an unprimeable number, because it can be changed into a prime (195661508719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27354018 + ... + 27361169.

It is an arithmetic number, because the mean of its divisors is an integer number (15388646625).

Almost surely, 2^195661508712 is an apocalyptic number.

195661508712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

195661508712 is an abundant number, since it is smaller than the sum of its proper divisors (296775183288).

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

195661508712 is a wasteful number, since it uses less digits than its factorization.

195661508712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54715345 (or 54715341 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 51.

The spelling of 195661508712 in words is "one hundred ninety-five billion, six hundred sixty-one million, five hundred eight thousand, seven hundred twelve".