199699205226945 has 8 divisors (see below), whose sum is σ = 319518728363136. Its totient is φ = 106506242787696.

The previous prime is 199699205226943. The next prime is 199699205226959. The reversal of 199699205226945 is 549622502996991.

It is a happy number.

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

It is not a de Polignac number, because 199699205226945 - 2¹ = 199699205226943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199699205226943) 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, 6656640174217 + ... + 6656640174246.

It is an arithmetic number, because the mean of its divisors is an integer number (39939841045392).

Almost surely, 2^{199699205226945} is an apocalyptic number.

199699205226945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199699205226945 is a deficient number, since it is larger than the sum of its proper divisors (119819523136191).

199699205226945 is a wasteful number, since it uses less digits than its factorization.

199699205226945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13313280348471.

The product of its (nonzero) digits is 1700611200, while the sum is 78.

The spelling of 199699205226945 in words is "one hundred ninety-nine trillion, six hundred ninety-nine billion, two hundred five million, two hundred twenty-six thousand, nine hundred forty-five".