78928675429 has 4 divisors (see below), whose sum is σ = 78949902240. Its totient is φ = 78907448620.

The previous prime is 78928675321. The next prime is 78928675439. The reversal of 78928675429 is 92457682987.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92457682987 = 163 ⋅567225049.

It is a cyclic number.

It is not a de Polignac number, because 78928675429 - 2⁹ = 78928674917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78928675439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10607827 + ... + 10615264.

It is an arithmetic number, because the mean of its divisors is an integer number (19737475560).

Almost surely, 2^78928675429 is an apocalyptic number.

It is an amenable number.

78928675429 is a deficient number, since it is larger than the sum of its proper divisors (21226811).

78928675429 is a wasteful number, since it uses less digits than its factorization.

78928675429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21226810.

The product of its digits is 121927680, while the sum is 67.

The spelling of 78928675429 in words is "seventy-eight billion, nine hundred twenty-eight million, six hundred seventy-five thousand, four hundred twenty-nine".