199386957777 has 8 divisors (see below), whose sum is σ = 303827745216. Its totient is φ = 113935404432.

The previous prime is 199386957769. The next prime is 199386957829. The reversal of 199386957777 is 777759683991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 199386957777 - 2³ = 199386957769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199386957727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4747308498 + ... + 4747308539.

It is an arithmetic number, because the mean of its divisors is an integer number (37978468152).

Almost surely, 2^199386957777 is an apocalyptic number.

It is an amenable number.

199386957777 is a deficient number, since it is larger than the sum of its proper divisors (104440787439).

199386957777 is an equidigital number, since it uses as much as digits as its factorization.

199386957777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9494617047.

The product of its digits is 1260236880, while the sum is 78.

The spelling of 199386957777 in words is "one hundred ninety-nine billion, three hundred eighty-six million, nine hundred fifty-seven thousand, seven hundred seventy-seven".