195450641604 has 81 divisors (see below), whose sum is σ = 513219929677. Its totient is φ = 65126340576.

The previous prime is 195450641597. The next prime is 195450641611. The reversal of 195450641604 is 406146054591.

The square root of 195450641604 is 442098.

It is a perfect power (a square), and thus also a powerful number.

195450641604 is a `hidden beast` number, since 1 + 9 + 545 + 0 + 6 + 41 + 60 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (195450641597) and next prime (195450641611).

It can be written as a sum of positive squares in only one way, i.e., 188354264004 + 7096377600 = 433998^2 + 84240^2 .

It is a tau number, because it is divible by the number of its divisors (81).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 195450641604.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 71618512 + ... + 71621240.

Almost surely, 2^195450641604 is an apocalyptic number.

195450641604 is the 442098-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195450641604

195450641604 is an abundant number, since it is smaller than the sum of its proper divisors (317769288073).

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

195450641604 is an frugal number, since it uses more digits than its factorization.

195450641604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5486 (or 2734 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 195450641604 in words is "one hundred ninety-five billion, four hundred fifty million, six hundred forty-one thousand, six hundred four".