78446148317 has 8 divisors (see below), whose sum is σ = 78597407160. Its totient is φ = 78294937600.

The previous prime is 78446148299. The next prime is 78446148367. The reversal of 78446148317 is 71384164487.

It can be written as a sum of positive squares in 4 ways, for example, as 34099684921 + 44346463396 = 184661^2 + 210586^2 .

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 78446148317 - 2²⁰ = 78445099741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78446148367) 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, 6476567 + ... + 6488667.

It is an arithmetic number, because the mean of its divisors is an integer number (9824675895).

Almost surely, 2^78446148317 is an apocalyptic number.

It is an amenable number.

78446148317 is a deficient number, since it is larger than the sum of its proper divisors (151258843).

78446148317 is a wasteful number, since it uses less digits than its factorization.

78446148317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24063.

The product of its digits is 3612672, while the sum is 53.

The spelling of 78446148317 in words is "seventy-eight billion, four hundred forty-six million, one hundred forty-eight thousand, three hundred seventeen".