78317375208 has 64 divisors (see below), whose sum is σ = 207448464960. Its totient is φ = 24553829376.

The previous prime is 78317375207. The next prime is 78317375239. The reversal of 78317375208 is 80257371387.

It is a super-2 number, since 2×78317375208² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (78317375207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558366 + ... + 684402.

It is an arithmetic number, because the mean of its divisors is an integer number (3241382265).

Almost surely, 2^78317375208 is an apocalyptic number.

It is an amenable number.

78317375208 is an abundant number, since it is smaller than the sum of its proper divisors (129131089752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78317375208 is a wasteful number, since it uses less digits than its factorization.

78317375208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127586 (or 127582 counting only the distinct ones).

The product of its (nonzero) digits is 1975680, while the sum is 51.

The spelling of 78317375208 in words is "seventy-eight billion, three hundred seventeen million, three hundred seventy-five thousand, two hundred eight".