78468875685172 has 36 divisors (see below), whose sum is σ = 159984836609220. Its totient is φ = 33578018068224.

The previous prime is 78468875685149. The next prime is 78468875685173. The reversal of 78468875685172 is 27158657886487.

It can be written as a sum of positive squares in 2 ways, for example, as 6666538097296 + 71802337587876 = 2581964^2 + 8473626^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78468875685173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 306419797 + ... + 306675772.

It is an arithmetic number, because the mean of its divisors is an integer number (4444023239145).

Almost surely, 2^{78468875685172} is an apocalyptic number.

It is an amenable number.

78468875685172 is an abundant number, since it is smaller than the sum of its proper divisors (81515960924048).

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

78468875685172 is a wasteful number, since it uses less digits than its factorization.

78468875685172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613096240 (or 613096231 counting only the distinct ones).

The product of its digits is 10115481600, while the sum is 82.

The spelling of 78468875685172 in words is "seventy-eight trillion, four hundred sixty-eight billion, eight hundred seventy-five million, six hundred eighty-five thousand, one hundred seventy-two".