78386108135 has 4 divisors (see below), whose sum is σ = 94063329768. Its totient is φ = 62708886504.

The previous prime is 78386108117. The next prime is 78386108137. The reversal of 78386108135 is 53180168387.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53180168387 = 1531 ⋅34735577.

It is a cyclic number.

It is not a de Polignac number, because 78386108135 - 2⁶ = 78386108071 is a prime.

It is a super-2 number, since 2×78386108135² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78386108137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7838610809 + ... + 7838610818.

It is an arithmetic number, because the mean of its divisors is an integer number (23515832442).

Almost surely, 2^78386108135 is an apocalyptic number.

78386108135 is a deficient number, since it is larger than the sum of its proper divisors (15677221633).

78386108135 is a wasteful number, since it uses less digits than its factorization.

78386108135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15677221632.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 78386108135 in words is "seventy-eight billion, three hundred eighty-six million, one hundred eight thousand, one hundred thirty-five".