78729429358 has 4 divisors (see below), whose sum is σ = 118094144040. Its totient is φ = 39364714678.

The previous prime is 78729429353. The next prime is 78729429367. The reversal of 78729429358 is 85392492787.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78729429358.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78729429353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19682357338 + ... + 19682357341.

It is an arithmetic number, because the mean of its divisors is an integer number (29523536010).

Almost surely, 2^78729429358 is an apocalyptic number.

78729429358 is a deficient number, since it is larger than the sum of its proper divisors (39364714682).

78729429358 is a wasteful number, since it uses less digits than its factorization.

78729429358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39364714681.

The product of its digits is 60963840, while the sum is 64.

The spelling of 78729429358 in words is "seventy-eight billion, seven hundred twenty-nine million, four hundred twenty-nine thousand, three hundred fifty-eight".