78317426904 has 192 divisors, whose sum is σ = 207461329920. Its totient is φ = 24623616000.

The previous prime is 78317426867. The next prime is 78317426909. The reversal of 78317426904 is 40962471387.

It is a super-2 number, since 2×78317426904² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78317426909) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 195305104 + ... + 195305504.

It is an arithmetic number, because the mean of its divisors is an integer number (1080527760).

Almost surely, 2^78317426904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78317426904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103730664960).

78317426904 is an abundant number, since it is smaller than the sum of its proper divisors (129143903016).

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

78317426904 is a wasteful number, since it uses less digits than its factorization.

78317426904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642 (or 597 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 78317426904 in words is "seventy-eight billion, three hundred seventeen million, four hundred twenty-six thousand, nine hundred four".