78585879380 has 24 divisors (see below), whose sum is σ = 166490797032. Its totient is φ = 31156170752.

The previous prime is 78585879371. The next prime is 78585879431. The reversal of 78585879380 is 8397858587.

It can be written as a sum of positive squares in 4 ways, for example, as 4679107216 + 73906772164 = 68404^2 + 271858^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78585879380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17383997 + ... + 17388516.

It is an arithmetic number, because the mean of its divisors is an integer number (6937116543).

Almost surely, 2^78585879380 is an apocalyptic number.

It is an amenable number.

78585879380 is an abundant number, since it is smaller than the sum of its proper divisors (87904917652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78585879380 is a wasteful number, since it uses less digits than its factorization.

78585879380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34772635 (or 34772633 counting only the distinct ones).

The product of its (nonzero) digits is 135475200, while the sum is 68.

The spelling of 78585879380 in words is "seventy-eight billion, five hundred eighty-five million, eight hundred seventy-nine thousand, three hundred eighty".