78148676711668 has 6 divisors (see below), whose sum is σ = 136760184245426. Its totient is φ = 39074338355832.

The previous prime is 78148676711627. The next prime is 78148676711683. The reversal of 78148676711668 is 86611767684187.

It can be written as a sum of positive squares in only one way, i.e., 77824366963344 + 324309748324 = 8821812^2 + 569482^2 .

It is a super-2 number, since 2×78148676711668² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78148676711594 and 78148676711603.

It is a congruent number.

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, 9768584588955 + ... + 9768584588962.

Almost surely, 2^{78148676711668} is an apocalyptic number.

It is an amenable number.

78148676711668 is a deficient number, since it is larger than the sum of its proper divisors (58611507533758).

78148676711668 is a wasteful number, since it uses less digits than its factorization.

78148676711668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19537169177921 (or 19537169177919 counting only the distinct ones).

The product of its digits is 910393344, while the sum is 76.

The spelling of 78148676711668 in words is "seventy-eight trillion, one hundred forty-eight billion, six hundred seventy-six million, seven hundred eleven thousand, six hundred sixty-eight".