78979080605489 has 8 divisors (see below), whose sum is σ = 79509379957800. Its totient is φ = 78448784432256.

The previous prime is 78979080605483. The next prime is 78979080605527. The reversal of 78979080605489 is 98450608097987.

It can be written as a sum of positive squares in 4 ways, for example, as 7818130472464 + 71160950133025 = 2796092^2 + 8435695^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78979080605489 - 2³² = 78974785638193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78979080605483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70387787 + ... + 71501039.

It is an arithmetic number, because the mean of its divisors is an integer number (9938672494725).

Almost surely, 2^{78979080605489} is an apocalyptic number.

It is an amenable number.

78979080605489 is a deficient number, since it is larger than the sum of its proper divisors (530299352311).

78979080605489 is a wasteful number, since it uses less digits than its factorization.

78979080605489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589539.

The product of its (nonzero) digits is 2194698240, while the sum is 80.

The spelling of 78979080605489 in words is "seventy-eight trillion, nine hundred seventy-nine billion, eighty million, six hundred five thousand, four hundred eighty-nine".