195945219650 has 12 divisors (see below), whose sum is σ = 364458108642. Its totient is φ = 78378087840.

The previous prime is 195945219641. The next prime is 195945219653. The reversal of 195945219650 is 56912549591.

It is a happy number.

It is a Cunningham number, because it is equal to 442657²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 180583352401 + 15361867249 = 424951^2 + 123943^2 .

It is a super-2 number, since 2×195945219650² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (195945219653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1959452147 + ... + 1959452246.

Almost surely, 2^195945219650 is an apocalyptic number.

195945219650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195945219650 is a deficient number, since it is larger than the sum of its proper divisors (168512888992).

195945219650 is a wasteful number, since it uses less digits than its factorization.

195945219650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3918904405 (or 3918904400 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 56.

The spelling of 195945219650 in words is "one hundred ninety-five billion, nine hundred forty-five million, two hundred nineteen thousand, six hundred fifty".