78718479508 has 12 divisors (see below), whose sum is σ = 137880674932. Its totient is φ = 39324000960.

The previous prime is 78718479479. The next prime is 78718479517. The reversal of 78718479508 is 80597481787.

It can be written as a sum of positive squares in 2 ways, for example, as 1868659984 + 76849819524 = 43228^2 + 277218^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78718479508.

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, 8804673 + ... + 8813608.

Almost surely, 2^78718479508 is an apocalyptic number.

It is an amenable number.

78718479508 is a deficient number, since it is larger than the sum of its proper divisors (59162195424).

78718479508 is a wasteful number, since it uses less digits than its factorization.

78718479508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17619402 (or 17619400 counting only the distinct ones).

The product of its (nonzero) digits is 31610880, while the sum is 64.

The spelling of 78718479508 in words is "seventy-eight billion, seven hundred eighteen million, four hundred seventy-nine thousand, five hundred eight".