78579093889 has 16 divisors (see below), whose sum is σ = 83571253632. Its totient is φ = 73719213568.

The previous prime is 78579093823. The next prime is 78579093959. The reversal of 78579093889 is 98839097587.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78579093889 is a prime.

It is a super-3 number, since 3×78579093889³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78579093809) 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 15 ways as a sum of consecutive naturals, for example, 4216977 + ... + 4235569.

It is an arithmetic number, because the mean of its divisors is an integer number (5223203352).

Almost surely, 2^78579093889 is an apocalyptic number.

It is an amenable number.

78579093889 is a deficient number, since it is larger than the sum of its proper divisors (4992159743).

78579093889 is a wasteful number, since it uses less digits than its factorization.

78579093889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22136.

The product of its (nonzero) digits is 274337280, while the sum is 73.

The spelling of 78579093889 in words is "seventy-eight billion, five hundred seventy-nine million, ninety-three thousand, eight hundred eighty-nine".