195444690489 has 12 divisors (see below), whose sum is σ = 283407479316. Its totient is φ = 129789468672.

The previous prime is 195444690473. The next prime is 195444690569. The reversal of 195444690489 is 984096444591.

195444690489 is a `hidden beast` number, since 1 + 9 + 54 + 44 + 69 + 0 + 489 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 176803430400 + 18641260089 = 420480^2 + 136533^2 .

It is not a de Polignac number, because 195444690489 - 2⁴ = 195444690473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (195444690989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42246864 + ... + 42251489.

It is an arithmetic number, because the mean of its divisors is an integer number (23617289943).

Almost surely, 2^195444690489 is an apocalyptic number.

It is an amenable number.

195444690489 is a deficient number, since it is larger than the sum of its proper divisors (87962788827).

195444690489 is a wasteful number, since it uses less digits than its factorization.

195444690489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84498616 (or 84498613 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 195444690489 in words is "one hundred ninety-five billion, four hundred forty-four million, six hundred ninety thousand, four hundred eighty-nine".