199601091000 has 160 divisors (see below), whose sum is σ = 697716985680. Its totient is φ = 53226936000.

The previous prime is 199601090977. The next prime is 199601091029. The reversal of 199601091000 is 190106991.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1151106 + ... + 1313105.

Almost surely, 2^199601091000 is an apocalyptic number.

199601091000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199601091000 is an abundant number, since it is smaller than the sum of its proper divisors (498115894680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199601091000 is a wasteful number, since it uses less digits than its factorization.

199601091000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464244 (or 2464221 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 36.

Adding to 199601091000 its reverse (190106991), we get a palindrome (199791197991).

The spelling of 199601091000 in words is "one hundred ninety-nine billion, six hundred one million, ninety-one thousand".