78867193647 has 16 divisors (see below), whose sum is σ = 114914760192. Its totient is φ = 47715448320.

The previous prime is 78867193619. The next prime is 78867193661. The reversal of 78867193647 is 74639176887.

It is not a de Polignac number, because 78867193647 - 2¹⁸ = 78866931503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78867193607) by changing a digit.

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, 2051943 + ... + 2090024.

It is an arithmetic number, because the mean of its divisors is an integer number (7182172512).

Almost surely, 2^78867193647 is an apocalyptic number.

78867193647 is a deficient number, since it is larger than the sum of its proper divisors (36047566545).

78867193647 is a wasteful number, since it uses less digits than its factorization.

78867193647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4142558.

The product of its digits is 85349376, while the sum is 66.

The spelling of 78867193647 in words is "seventy-eight billion, eight hundred sixty-seven million, one hundred ninety-three thousand, six hundred forty-seven".