199690638907 has 8 divisors (see below), whose sum is σ = 211441150656. Its totient is φ = 187940572032.

The previous prime is 199690638887. The next prime is 199690638919. The reversal of 199690638907 is 709836096991.

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

It is a cyclic number.

It is not a de Polignac number, because 199690638907 - 2¹⁵ = 199690606139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199690638997) 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, 1398813 + ... + 1534945.

It is an arithmetic number, because the mean of its divisors is an integer number (26430143832).

Almost surely, 2^199690638907 is an apocalyptic number.

199690638907 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

199690638907 is a deficient number, since it is larger than the sum of its proper divisors (11750511749).

199690638907 is a wasteful number, since it uses less digits than its factorization.

199690638907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222437.

The product of its (nonzero) digits is 39680928, while the sum is 67.

The spelling of 199690638907 in words is "one hundred ninety-nine billion, six hundred ninety million, six hundred thirty-eight thousand, nine hundred seven".