78506884561436 has 12 divisors (see below), whose sum is σ = 140310176663328. Its totient is φ = 38418262657632.

The previous prime is 78506884561387. The next prime is 78506884561453. The reversal of 78506884561436 is 63416548860587.

It is a self number, because there is not a number n which added to its sum of digits gives 78506884561436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208794905561 + ... + 208794905936.

It is an arithmetic number, because the mean of its divisors is an integer number (11692514721944).

Almost surely, 2^{78506884561436} is an apocalyptic number.

It is an amenable number.

78506884561436 is a deficient number, since it is larger than the sum of its proper divisors (61803292101892).

78506884561436 is a wasteful number, since it uses less digits than its factorization.

78506884561436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417589811548 (or 417589811546 counting only the distinct ones).

The product of its (nonzero) digits is 928972800, while the sum is 71.

The spelling of 78506884561436 in words is "seventy-eight trillion, five hundred six billion, eight hundred eighty-four million, five hundred sixty-one thousand, four hundred thirty-six".