78329109105 has 128 divisors (see below), whose sum is σ = 155262320640. Its totient is φ = 37206915840.

The previous prime is 78329109049. The next prime is 78329109151. The reversal of 78329109105 is 50190192387.

It is not a de Polignac number, because 78329109105 - 2⁹ = 78329108593 is a prime.

It is a super-2 number, since 2×78329109105² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 127 ways as a sum of consecutive naturals, for example, 19964674 + ... + 19968596.

It is an arithmetic number, because the mean of its divisors is an integer number (1212986880).

Almost surely, 2^78329109105 is an apocalyptic number.

It is an amenable number.

78329109105 is a deficient number, since it is larger than the sum of its proper divisors (76933211535).

78329109105 is a wasteful number, since it uses less digits than its factorization.

78329109105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4348 (or 4342 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The spelling of 78329109105 in words is "seventy-eight billion, three hundred twenty-nine million, one hundred nine thousand, one hundred five".