78823404637952 has 432 divisors, whose sum is σ = 187612884006912. Its totient is φ = 32812531384320.

The previous prime is 78823404637949. The next prime is 78823404637987. The reversal of 78823404637952 is 25973640432887.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3070989023 + ... + 3071014689.

Almost surely, 2^{78823404637952} 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 78823404637952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93806442003456).

78823404637952 is an abundant number, since it is smaller than the sum of its proper divisors (108789479368960).

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

78823404637952 is a wasteful number, since it uses less digits than its factorization.

78823404637952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25864 (or 25833 counting only the distinct ones).

The product of its (nonzero) digits is 487710720, while the sum is 68.

The spelling of 78823404637952 in words is "seventy-eight trillion, eight hundred twenty-three billion, four hundred four million, six hundred thirty-seven thousand, nine hundred fifty-two".