195919220450 has 18 divisors (see below), whose sum is σ = 364415571651. Its totient is φ = 78366436240.

The previous prime is 195919220417. The next prime is 195919220473. The reversal of 195919220450 is 54022919591.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 106369256449 + 89549964001 = 326143^2 + 299249^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=312985.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195919220395 and 195919220404.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3098552 + ... + 3161148.

Almost surely, 2^195919220450 is an apocalyptic number.

195919220450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195919220450 is a deficient number, since it is larger than the sum of its proper divisors (168496351201).

195919220450 is an frugal number, since it uses more digits than its factorization.

195919220450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125206 (or 62604 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 195919220450 in words is "one hundred ninety-five billion, nine hundred nineteen million, two hundred twenty thousand, four hundred fifty".