78316786527 has 24 divisors (see below), whose sum is σ = 125951504256. Its totient is φ = 42397053264.

The previous prime is 78316786523. The next prime is 78316786577. The reversal of 78316786527 is 72568761387.

It is a happy number.

It is not a de Polignac number, because 78316786527 - 2² = 78316786523 is a prime.

It is a super-2 number, since 2×78316786527² (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 (78316786523) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 5157753 + ... + 5172914.

It is an arithmetic number, because the mean of its divisors is an integer number (5247979344).

Almost surely, 2^78316786527 is an apocalyptic number.

78316786527 is a deficient number, since it is larger than the sum of its proper divisors (47634717729).

78316786527 is a wasteful number, since it uses less digits than its factorization.

78316786527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10330715 (or 10330696 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 60.

The spelling of 78316786527 in words is "seventy-eight billion, three hundred sixteen million, seven hundred eighty-six thousand, five hundred twenty-seven".