78579444358 has 4 divisors (see below), whose sum is σ = 117869166540. Its totient is φ = 39289722178.

The previous prime is 78579444347. The next prime is 78579444407. The reversal of 78579444358 is 85344497587.

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

It is a super-2 number, since 2×78579444358² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78579444358.

It is a congruent number.

It is an unprimeable number.

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, 19644861088 + ... + 19644861091.

It is an arithmetic number, because the mean of its divisors is an integer number (29467291635).

Almost surely, 2^78579444358 is an apocalyptic number.

78579444358 is a deficient number, since it is larger than the sum of its proper divisors (39289722182).

78579444358 is a wasteful number, since it uses less digits than its factorization.

78579444358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39289722181.

The product of its digits is 135475200, while the sum is 64.

The spelling of 78579444358 in words is "seventy-eight billion, five hundred seventy-nine million, four hundred forty-four thousand, three hundred fifty-eight".