245243686342542 has 32 divisors (see below), whose sum is σ = 507620480320800. Its totient is φ = 78894819174528.

The previous prime is 245243686342469. The next prime is 245243686342649.

245243686342542 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304805353 + ... + 305608884.

It is an arithmetic number, because the mean of its divisors is an integer number (15863140010025).

Almost surely, 2^{245243686342542} is an apocalyptic number.

245243686342542 is an abundant number, since it is smaller than the sum of its proper divisors (262376793978258).

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

245243686342542 is a wasteful number, since it uses less digits than its factorization.

245243686342542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610416580.

The product of its digits is 265420800, while the sum is 60.

The spelling of 245243686342542 in words is "two hundred forty-five trillion, two hundred forty-three billion, six hundred eighty-six million, three hundred forty-two thousand, five hundred forty-two".