78535701667028 has 48 divisors (see below), whose sum is σ = 149180891339088. Its totient is φ = 36030068736000.

The previous prime is 78535701667001. The next prime is 78535701667037. The reversal of 78535701667028 is 82076610753587.

It can be written as a sum of positive squares in 8 ways, for example, as 1677201124624 + 76858500542404 = 1295068^2 + 8766898^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6554243 + ... + 14143178.

It is an arithmetic number, because the mean of its divisors is an integer number (3107935236231).

Almost surely, 2^{78535701667028} is an apocalyptic number.

It is an amenable number.

78535701667028 is a deficient number, since it is larger than the sum of its proper divisors (70645189672060).

78535701667028 is a wasteful number, since it uses less digits than its factorization.

78535701667028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20698844 (or 20698842 counting only the distinct ones).

The product of its (nonzero) digits is 118540800, while the sum is 65.

The spelling of 78535701667028 in words is "seventy-eight trillion, five hundred thirty-five billion, seven hundred one million, six hundred sixty-seven thousand, twenty-eight".