199946075508 has 84 divisors (see below), whose sum is σ = 525146124580. Its totient is φ = 66581657856.

The previous prime is 199946075503. The next prime is 199946075533. The reversal of 199946075508 is 805570649991.

199946075508 is a `hidden beast` number, since 19 + 9 + 9 + 4 + 60 + 7 + 550 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28713980304 + 171232095204 = 169452^2 + 413802^2 .

It is a super-2 number, since 2×199946075508² (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 (199946075503) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 2908266 + ... + 2976222.

Almost surely, 2^199946075508 is an apocalyptic number.

199946075508 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199946075508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262573062290).

199946075508 is an abundant number, since it is smaller than the sum of its proper divisors (325200049072).

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

199946075508 is a wasteful number, since it uses less digits than its factorization.

199946075508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68988 (or 68971 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 63.

The spelling of 199946075508 in words is "one hundred ninety-nine billion, nine hundred forty-six million, seventy-five thousand, five hundred eight".