78478787782 has 8 divisors (see below), whose sum is σ = 117814913496. Its totient is φ = 39207149952.

The previous prime is 78478787773. The next prime is 78478787789. The reversal of 78478787782 is 28778787487.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78478787789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16118928 + ... + 16123795.

It is an arithmetic number, because the mean of its divisors is an integer number (14726864187).

Almost surely, 2^78478787782 is an apocalyptic number.

78478787782 is a deficient number, since it is larger than the sum of its proper divisors (39336125714).

78478787782 is a wasteful number, since it uses less digits than its factorization.

78478787782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32243942.

The product of its digits is 550731776, while the sum is 73.

The spelling of 78478787782 in words is "seventy-eight billion, four hundred seventy-eight million, seven hundred eighty-seven thousand, seven hundred eighty-two".