78174864827764 has 12 divisors (see below), whose sum is σ = 137015517302244. Its totient is φ = 39027574169984.

The previous prime is 78174864827753. The next prime is 78174864827767. The reversal of 78174864827764 is 46772846847187.

It can be written as a sum of positive squares in 2 ways, for example, as 49588947131364 + 28585917696400 = 7041942^2 + 5346580^2 .

It is a super-2 number, since 2×78174864827764² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78174864827767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14964558037 + ... + 14964563260.

It is an arithmetic number, because the mean of its divisors is an integer number (11417959775187).

Almost surely, 2^{78174864827764} is an apocalyptic number.

It is an amenable number.

78174864827764 is a deficient number, since it is larger than the sum of its proper divisors (58840652474480).

78174864827764 is a wasteful number, since it uses less digits than its factorization.

78174864827764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29929121954 (or 29929121952 counting only the distinct ones).

The product of its digits is 5664669696, while the sum is 79.

The spelling of 78174864827764 in words is "seventy-eight trillion, one hundred seventy-four billion, eight hundred sixty-four million, eight hundred twenty-seven thousand, seven hundred sixty-four".