199524940378 has 8 divisors (see below), whose sum is σ = 299417712372. Its totient is φ = 99719036256.

The previous prime is 199524940301. The next prime is 199524940379. The reversal of 199524940378 is 873049425991.

It can be written as a sum of positive squares in 2 ways, for example, as 199302423489 + 222516889 = 446433^2 + 14917^2 .

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

It is not an unprimeable number, because it can be changed into a prime (199524940379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21711225 + ... + 21720412.

Almost surely, 2^199524940378 is an apocalyptic number.

199524940378 is a deficient number, since it is larger than the sum of its proper divisors (99892771994).

199524940378 is a wasteful number, since it uses less digits than its factorization.

199524940378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43433936.

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 199524940378 in words is "one hundred ninety-nine billion, five hundred twenty-four million, nine hundred forty thousand, three hundred seventy-eight".