78680258786522 has 4 divisors (see below), whose sum is σ = 118020388179786. Its totient is φ = 39340129393260.

The previous prime is 78680258786513. The next prime is 78680258786539. The reversal of 78680258786522 is 22568785208687.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 70249894273441 + 8430364513081 = 8381521^2 + 2903509^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78680258786522.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19670064696629 + ... + 19670064696632.

Almost surely, 2^{78680258786522} is an apocalyptic number.

78680258786522 is a deficient number, since it is larger than the sum of its proper divisors (39340129393264).

78680258786522 is a wasteful number, since it uses less digits than its factorization.

78680258786522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39340129393263.

The product of its (nonzero) digits is 1445068800, while the sum is 74.

The spelling of 78680258786522 in words is "seventy-eight trillion, six hundred eighty billion, two hundred fifty-eight million, seven hundred eighty-six thousand, five hundred twenty-two".