245636450242 has 4 divisors (see below), whose sum is σ = 368454675366. Its totient is φ = 122818225120.

The previous prime is 245636450239. The next prime is 245636450243. The reversal of 245636450242 is 242054636542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 216317079801 + 29319370441 = 465099^2 + 171229^2 .

It is not an unprimeable number, because it can be changed into a prime (245636450243) 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 as a sum of consecutive naturals, namely, 61409112559 + ... + 61409112562.

Almost surely, 2^245636450242 is an apocalyptic number.

245636450242 is a deficient number, since it is larger than the sum of its proper divisors (122818225124).

245636450242 is a wasteful number, since it uses less digits than its factorization.

245636450242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122818225123.

The product of its (nonzero) digits is 1382400, while the sum is 43.

The spelling of 245636450242 in words is "two hundred forty-five billion, six hundred thirty-six million, four hundred fifty thousand, two hundred forty-two".