78736634496 has 192 divisors, whose sum is σ = 253039943520. Its totient is φ = 24226532352.

The previous prime is 78736634491. The next prime is 78736634519. The reversal of 78736634496 is 69443663787.

78736634496 is a `hidden beast` number, since 7 + 87 + 3 + 6 + 63 + 4 + 496 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×78736634496² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78736634491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 306991 + ... + 501713.

Almost surely, 2^78736634496 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 78736634496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126519971760).

78736634496 is an abundant number, since it is smaller than the sum of its proper divisors (174303309024).

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

78736634496 is a wasteful number, since it uses less digits than its factorization.

78736634496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194765 (or 194741 counting only the distinct ones).

The product of its digits is 109734912, while the sum is 63.

The spelling of 78736634496 in words is "seventy-eight billion, seven hundred thirty-six million, six hundred thirty-four thousand, four hundred ninety-six".