78136710605 has 8 divisors (see below), whose sum is σ = 93766729464. Its totient is φ = 62507584000.

The previous prime is 78136710577. The next prime is 78136710637. The reversal of 78136710605 is 50601763187.

It can be written as a sum of positive squares in 4 ways, for example, as 2125117801 + 76011592804 = 46099^2 + 275702^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78136710605 - 2²⁶ = 78069601741 is a prime.

It is a super-2 number, since 2×78136710605² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12296 + ... + 395505.

It is an arithmetic number, because the mean of its divisors is an integer number (11720841183).

Almost surely, 2^78136710605 is an apocalyptic number.

It is an amenable number.

78136710605 is a deficient number, since it is larger than the sum of its proper divisors (15630018859).

78136710605 is a wasteful number, since it uses less digits than its factorization.

78136710605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446127.

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 78136710605 in words is "seventy-eight billion, one hundred thirty-six million, seven hundred ten thousand, six hundred five".