195640445 has 32 divisors (see below), whose sum is σ = 315221760. Its totient is φ = 112573440.

The previous prime is 195640441. The next prime is 195640451. The reversal of 195640445 is 544046591.

It is not a de Polignac number, because 195640445 - 2² = 195640441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 195640399 and 195640408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195640441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14540 + ... + 24549.

It is an arithmetic number, because the mean of its divisors is an integer number (9850680).

Almost surely, 2^195640445 is an apocalyptic number.

It is an amenable number.

195640445 is a deficient number, since it is larger than the sum of its proper divisors (119581315).

195640445 is a wasteful number, since it uses less digits than its factorization.

195640445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39125.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 195640445 is about 13987.1528553884. The cubic root of 195640445 is about 580.5231556016.

The spelling of 195640445 in words is "one hundred ninety-five million, six hundred forty thousand, four hundred forty-five".