199524940394 has 8 divisors (see below), whose sum is σ = 322309519140. Its totient is φ = 92088434016.

The previous prime is 199524940379. The next prime is 199524940423. The reversal of 199524940394 is 493049425991.

It can be written as a sum of positive squares in 2 ways, for example, as 166958046025 + 32566894369 = 408605^2 + 180463^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3837018059 + ... + 3837018110.

Almost surely, 2^199524940394 is an apocalyptic number.

199524940394 is a deficient number, since it is larger than the sum of its proper divisors (122784578746).

199524940394 is a wasteful number, since it uses less digits than its factorization.

199524940394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7674036184.

The product of its (nonzero) digits is 12597120, while the sum is 59.

The spelling of 199524940394 in words is "one hundred ninety-nine billion, five hundred twenty-four million, nine hundred forty thousand, three hundred ninety-four".