78684857127 has 6 divisors (see below), whose sum is σ = 113655904752. Its totient is φ = 52456571412.

The previous prime is 78684857117. The next prime is 78684857171. The reversal of 78684857127 is 72175848687.

78684857127 is a `hidden beast` number, since 7 + 8 + 68 + 485 + 71 + 27 = 666.

It is not a de Polignac number, because 78684857127 - 2¹² = 78684853031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78684857117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4371380943 + ... + 4371380960.

It is an arithmetic number, because the mean of its divisors is an integer number (18942650792).

Almost surely, 2^78684857127 is an apocalyptic number.

78684857127 is a deficient number, since it is larger than the sum of its proper divisors (34971047625).

78684857127 is a wasteful number, since it uses less digits than its factorization.

78684857127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8742761909 (or 8742761906 counting only the distinct ones).

The product of its digits is 42147840, while the sum is 63.

The spelling of 78684857127 in words is "seventy-eight billion, six hundred eighty-four million, eight hundred fifty-seven thousand, one hundred twenty-seven".