78174427344321 has 16 divisors (see below), whose sum is σ = 129952294806528. Its totient is φ = 40610092126800.

The previous prime is 78174427344271. The next prime is 78174427344323. The reversal of 78174427344321 is 12344372447187.

It is not a de Polignac number, because 78174427344321 - 2¹⁰ = 78174427343297 is a prime.

It is a super-2 number, since 2×78174427344321² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78174427344323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169208716965 + ... + 169208717426.

It is an arithmetic number, because the mean of its divisors is an integer number (8122018425408).

Almost surely, 2^{78174427344321} is an apocalyptic number.

It is an amenable number.

78174427344321 is a deficient number, since it is larger than the sum of its proper divisors (51777867462207).

78174427344321 is a wasteful number, since it uses less digits than its factorization.

78174427344321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338417434412.

The product of its digits is 25288704, while the sum is 57.

The spelling of 78174427344321 in words is "seventy-eight trillion, one hundred seventy-four billion, four hundred twenty-seven million, three hundred forty-four thousand, three hundred twenty-one".