78218866845042 has 64 divisors (see below), whose sum is σ = 195041004447744. Its totient is φ = 20316406285440.

The previous prime is 78218866845023. The next prime is 78218866845079. The reversal of 78218866845042 is 24054866881287.

It is a super-2 number, since 2×78218866845042² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55172923 + ... + 56572865.

It is an arithmetic number, because the mean of its divisors is an integer number (3047515694496).

Almost surely, 2^{78218866845042} is an apocalyptic number.

78218866845042 is an abundant number, since it is smaller than the sum of its proper divisors (116822137602702).

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

78218866845042 is a wasteful number, since it uses less digits than its factorization.

78218866845042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520903.

The product of its (nonzero) digits is 330301440, while the sum is 69.

The spelling of 78218866845042 in words is "seventy-eight trillion, two hundred eighteen billion, eight hundred sixty-six million, eight hundred forty-five thousand, forty-two".