199439971269 has 16 divisors (see below), whose sum is σ = 331536576000. Its totient is φ = 103605179760.

The previous prime is 199439971249. The next prime is 199439971279. The reversal of 199439971269 is 962179934991.

It is not a de Polignac number, because 199439971269 - 2⁷ = 199439971141 is a prime.

It is a super-2 number, since 2×199439971269² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199439971249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 431688019 + ... + 431688480.

It is an arithmetic number, because the mean of its divisors is an integer number (20721036000).

Almost surely, 2^199439971269 is an apocalyptic number.

It is an amenable number.

199439971269 is a deficient number, since it is larger than the sum of its proper divisors (132096604731).

199439971269 is a wasteful number, since it uses less digits than its factorization.

199439971269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863376520.

The product of its digits is 59521392, while the sum is 69.

The spelling of 199439971269 in words is "one hundred ninety-nine billion, four hundred thirty-nine million, nine hundred seventy-one thousand, two hundred sixty-nine".