78148656285776 has 20 divisors (see below), whose sum is σ = 152288241336852. Its totient is φ = 38848464973056.

The previous prime is 78148656285773. The next prime is 78148656285779. The reversal of 78148656285776 is 67758265684187.

It is an interprime number because it is at equal distance from previous prime (78148656285773) and next prime (78148656285779).

It can be written as a sum of positive squares in 2 ways, for example, as 66268391491600 + 11880264794176 = 8140540^2 + 3446776^2 .

It is a super-2 number, since 2×78148656285776² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78148656285776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78148656285773) 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, 14116445261 + ... + 14116450796.

Almost surely, 2^{78148656285776} is an apocalyptic number.

It is an amenable number.

78148656285776 is a deficient number, since it is larger than the sum of its proper divisors (74139585051076).

78148656285776 is a wasteful number, since it uses less digits than its factorization.

78148656285776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28232896238 (or 28232896232 counting only the distinct ones).

The product of its digits is 7586611200, while the sum is 80.

The spelling of 78148656285776 in words is "seventy-eight trillion, one hundred forty-eight billion, six hundred fifty-six million, two hundred eighty-five thousand, seven hundred seventy-six".