78278799135 has 16 divisors (see below), whose sum is σ = 126202158720. Its totient is φ = 41429999520.

The previous prime is 78278799107. The next prime is 78278799139. The reversal of 78278799135 is 53199787287.

It is not a de Polignac number, because 78278799135 - 2⁸ = 78278798879 is a prime.

It is a super-2 number, since 2×78278799135² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78278799139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19916305 + ... + 19920234.

It is an arithmetic number, because the mean of its divisors is an integer number (7887634920).

Almost surely, 2^78278799135 is an apocalyptic number.

78278799135 is a deficient number, since it is larger than the sum of its proper divisors (47923359585).

78278799135 is a wasteful number, since it uses less digits than its factorization.

78278799135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39836678.

The product of its digits is 53343360, while the sum is 66.

The spelling of 78278799135 in words is "seventy-eight billion, two hundred seventy-eight million, seven hundred ninety-nine thousand, one hundred thirty-five".