195536418025 has 27 divisors (see below), whose sum is σ = 262589628549. Its totient is φ = 144374898720.

The previous prime is 195536418023. The next prime is 195536418031. The reversal of 195536418025 is 520814635591.

The square root of 195536418025 is 442195.

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

It can be written as a sum of positive squares in 4 ways, for example, as 50399801001 + 145136617024 = 224499^2 + 380968^2 .

It is not a de Polignac number, because 195536418025 - 2¹ = 195536418023 is a prime.

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 195536418025.

It is not an unprimeable number, because it can be changed into a prime (195536418023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 28739274 + ... + 28746076.

Almost surely, 2^195536418025 is an apocalyptic number.

195536418025 is the 442195-th square number.

195536418025 is the 221098-th centered octagonal number.

It is an amenable number.

195536418025 is a deficient number, since it is larger than the sum of its proper divisors (67053210524).

195536418025 is an frugal number, since it uses more digits than its factorization.

195536418025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13642 (or 6821 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 49.

Multiplying 195536418025 by its sum of digits (49), we get a square (9581284483225 = 3095365²).

The spelling of 195536418025 in words is "one hundred ninety-five billion, five hundred thirty-six million, four hundred eighteen thousand, twenty-five".