78148656288845 has 8 divisors (see below), whose sum is σ = 93931370237976. Its totient is φ = 62416936570176.

The previous prime is 78148656288841. The next prime is 78148656288877. The reversal of 78148656288845 is 54888265684187.

It can be written as a sum of positive squares in 4 ways, for example, as 2672142739561 + 75476513549284 = 1634669^2 + 8687722^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 78148656288845 - 2² = 78148656288841 is a prime.

It is a super-2 number, since 2×78148656288845² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78148656288845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78148656288841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12748554242 + ... + 12748560371.

It is an arithmetic number, because the mean of its divisors is an integer number (11741421279747).

Almost surely, 2^{78148656288845} is an apocalyptic number.

It is an amenable number.

78148656288845 is a deficient number, since it is larger than the sum of its proper divisors (15782713949131).

78148656288845 is a wasteful number, since it uses less digits than its factorization.

78148656288845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25497115231.

The product of its digits is 6606028800, while the sum is 80.

The spelling of 78148656288845 in words is "seventy-eight trillion, one hundred forty-eight billion, six hundred fifty-six million, two hundred eighty-eight thousand, eight hundred forty-five".