195099773401 has 27 divisors (see below), whose sum is σ = 215168267223. Its totient is φ = 176821744320.

The previous prime is 195099773381. The next prime is 195099773411. The reversal of 195099773401 is 104377990591.

The square root of 195099773401 is 441701.

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

It can be written as a sum of positive squares in 13 ways, for example, as 115293523401 + 79806250000 = 339549^2 + 282500^2 .

It is not a de Polignac number, because 195099773401 - 2¹⁷ = 195099642329 is a prime.

It is a super-2 number, since 2×195099773401² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (195099773411) 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, 350268615 + ... + 350269171.

Almost surely, 2^195099773401 is an apocalyptic number.

195099773401 is the 441701-st square number.

195099773401 is the 220851-st centered octagonal number.

It is an amenable number.

195099773401 is a deficient number, since it is larger than the sum of its proper divisors (20068493822).

195099773401 is an frugal number, since it uses more digits than its factorization.

195099773401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 55.

The spelling of 195099773401 in words is "one hundred ninety-five billion, ninety-nine million, seven hundred seventy-three thousand, four hundred one".