78217560368642 has 16 divisors (see below), whose sum is σ = 118016589427200. Its totient is φ = 38878826094960.

The previous prime is 78217560368617. The next prime is 78217560368663. The reversal of 78217560368642 is 24686306571287.

It is a super-2 number, since 2×78217560368642² (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 7 ways as a sum of consecutive naturals, for example, 31001417 + ... + 33429372.

It is an arithmetic number, because the mean of its divisors is an integer number (7376036839200).

Almost surely, 2^{78217560368642} is an apocalyptic number.

78217560368642 is a deficient number, since it is larger than the sum of its proper divisors (39799029058558).

78217560368642 is a wasteful number, since it uses less digits than its factorization.

78217560368642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64434361.

The product of its (nonzero) digits is 162570240, while the sum is 65.

The spelling of 78217560368642 in words is "seventy-eight trillion, two hundred seventeen billion, five hundred sixty million, three hundred sixty-eight thousand, six hundred forty-two".