78535458356842 has 16 divisors (see below), whose sum is σ = 119029779900360. Its totient is φ = 38858947550208.

The previous prime is 78535458356801. The next prime is 78535458356843. The reversal of 78535458356842 is 24865385453587.

It can be written as a sum of positive squares in 4 ways, for example, as 66507955768081 + 12027502588761 = 8155241^2 + 3468069^2 .

It is not an unprimeable number, because it can be changed into a prime (78535458356843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18713917 + ... + 22522912.

Almost surely, 2^{78535458356842} is an apocalyptic number.

78535458356842 is a deficient number, since it is larger than the sum of its proper divisors (40494321543518).

78535458356842 is a wasteful number, since it uses less digits than its factorization.

78535458356842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41246745.

The product of its digits is 3870720000, while the sum is 73.

The spelling of 78535458356842 in words is "seventy-eight trillion, five hundred thirty-five billion, four hundred fifty-eight million, three hundred fifty-six thousand, eight hundred forty-two".