78650786438 has 8 divisors (see below), whose sum is σ = 134829919632. Its totient is φ = 33707479896.

The previous prime is 78650786419. The next prime is 78650786441. The reversal of 78650786438 is 83468705687.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2808956645 + ... + 2808956672.

It is an arithmetic number, because the mean of its divisors is an integer number (16853739954).

Almost surely, 2^78650786438 is an apocalyptic number.

78650786438 is a deficient number, since it is larger than the sum of its proper divisors (56179133194).

78650786438 is a wasteful number, since it uses less digits than its factorization.

78650786438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5617913326.

The product of its (nonzero) digits is 54190080, while the sum is 62.

The spelling of 78650786438 in words is "seventy-eight billion, six hundred fifty million, seven hundred eighty-six thousand, four hundred thirty-eight".