78795447579 has 6 divisors (see below), whose sum is σ = 113815646516. Its totient is φ = 52530298380.

The previous prime is 78795447569. The next prime is 78795447583. The reversal of 78795447579 is 97574459787.

78795447579 is a `hidden beast` number, since 7 + 8 + 7 + 9 + 5 + 4 + 47 + 579 = 666.

It is not a de Polignac number, because 78795447579 - 2⁸ = 78795447323 is a prime.

It is a super-2 number, since 2×78795447579² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78795447569) 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 in 5 ways as a sum of consecutive naturals, for example, 4377524857 + ... + 4377524874.

Almost surely, 2^78795447579 is an apocalyptic number.

78795447579 is a deficient number, since it is larger than the sum of its proper divisors (35020198937).

78795447579 is a wasteful number, since it uses less digits than its factorization.

78795447579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8755049737 (or 8755049734 counting only the distinct ones).

The product of its digits is 622339200, while the sum is 72.

The spelling of 78795447579 in words is "seventy-eight billion, seven hundred ninety-five million, four hundred forty-seven thousand, five hundred seventy-nine".