199452902542 has 32 divisors (see below), whose sum is σ = 309167480160. Its totient is φ = 96444794880.

The previous prime is 199452902533. The next prime is 199452902549. The reversal of 199452902542 is 245209254991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 199452902542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199452902549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9795292 + ... + 9815632.

It is an arithmetic number, because the mean of its divisors is an integer number (9661483755).

Almost surely, 2^199452902542 is an apocalyptic number.

199452902542 is a deficient number, since it is larger than the sum of its proper divisors (109714577618).

199452902542 is a wasteful number, since it uses less digits than its factorization.

199452902542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21508.

The product of its (nonzero) digits is 2332800, while the sum is 52.

The spelling of 199452902542 in words is "one hundred ninety-nine billion, four hundred fifty-two million, nine hundred two thousand, five hundred forty-two".