78620799702686 has 16 divisors (see below), whose sum is σ = 118019375768448. Its totient is φ = 39281010951000.

The previous prime is 78620799702623. The next prime is 78620799702701. The reversal of 78620799702686 is 68620799702687.

It is a super-2 number, since 2×78620799702686² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49395071 + ... + 50961893.

It is an arithmetic number, because the mean of its divisors is an integer number (7376210985528).

Almost surely, 2^{78620799702686} is an apocalyptic number.

78620799702686 is a deficient number, since it is larger than the sum of its proper divisors (39398576065762).

78620799702686 is a wasteful number, since it uses less digits than its factorization.

78620799702686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585567.

The product of its (nonzero) digits is 1536288768, while the sum is 77.

Subtracting from 78620799702686 its reverse (68620799702687), we obtain a palindrome (9999999999999).

The spelling of 78620799702686 in words is "seventy-eight trillion, six hundred twenty billion, seven hundred ninety-nine million, seven hundred two thousand, six hundred eighty-six".