78079546289 has 8 divisors (see below), whose sum is σ = 78343185960. Its totient is φ = 77816016256.

The previous prime is 78079546267. The next prime is 78079546351. The reversal of 78079546289 is 98264597087.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 670395664 + 77409150625 = 25892^2 + 278225^2 .

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 78079546289 - 2¹² = 78079542193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78079546889) 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, 1551677 + ... + 1601205.

It is an arithmetic number, because the mean of its divisors is an integer number (9792898245).

Almost surely, 2^78079546289 is an apocalyptic number.

It is an amenable number.

78079546289 is a deficient number, since it is larger than the sum of its proper divisors (263639671).

78079546289 is a wasteful number, since it uses less digits than its factorization.

78079546289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54819.

The product of its (nonzero) digits is 60963840, while the sum is 65.

The spelling of 78079546289 in words is "seventy-eight billion, seventy-nine million, five hundred forty-six thousand, two hundred eighty-nine".