78729792788 has 12 divisors (see below), whose sum is σ = 138498484992. Its totient is φ = 39158797080.

The previous prime is 78729792767. The next prime is 78729792797. The reversal of 78729792788 is 88729792787.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51523970 + ... + 51525497.

It is an arithmetic number, because the mean of its divisors is an integer number (11541540416).

Almost surely, 2^78729792788 is an apocalyptic number.

It is an amenable number.

78729792788 is a deficient number, since it is larger than the sum of its proper divisors (59768692204).

78729792788 is a wasteful number, since it uses less digits than its factorization.

78729792788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103049662 (or 103049660 counting only the distinct ones).

The product of its digits is 398297088, while the sum is 74.

Subtracting 78729792788 from its reverse (88729792787), we obtain a palindrome (9999999999).

The spelling of 78729792788 in words is "seventy-eight billion, seven hundred twenty-nine million, seven hundred ninety-two thousand, seven hundred eighty-eight".