78317902264 has 192 divisors, whose sum is σ = 186840345600. Its totient is φ = 30569011200.

The previous prime is 78317902147. The next prime is 78317902279. The reversal of 78317902264 is 46220971387.

It is a happy number.

It is a super-2 number, since 2×78317902264² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37633704 + ... + 37635784.

It is an arithmetic number, because the mean of its divisors is an integer number (973126800).

Almost surely, 2^78317902264 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 78317902264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93420172800).

78317902264 is an abundant number, since it is smaller than the sum of its proper divisors (108522443336).

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

78317902264 is a wasteful number, since it uses less digits than its factorization.

78317902264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314 (or 2303 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 78317902264 in words is "seventy-eight billion, three hundred seventeen million, nine hundred two thousand, two hundred sixty-four".