195266973019 has 4 divisors (see below), whose sum is σ = 195274181520. Its totient is φ = 195259764520.

The previous prime is 195266972987. The next prime is 195266973079. The reversal of 195266973019 is 910379662591.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 195266973019 - 2⁵ = 195266972987 is a prime.

It is a super-2 number, since 2×195266973019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195266973079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3563464 + ... + 3617845.

It is an arithmetic number, because the mean of its divisors is an integer number (48818545380).

Almost surely, 2^195266973019 is an apocalyptic number.

195266973019 is a deficient number, since it is larger than the sum of its proper divisors (7208501).

195266973019 is an equidigital number, since it uses as much as digits as its factorization.

195266973019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7208500.

The product of its (nonzero) digits is 5511240, while the sum is 58.

The spelling of 195266973019 in words is "one hundred ninety-five billion, two hundred sixty-six million, nine hundred seventy-three thousand, nineteen".