63836734068 has 180 divisors, whose sum is σ = 183014844012. Its totient is φ = 19335214080.

The previous prime is 63836734063. The next prime is 63836734081. The reversal of 63836734068 is 86043763836.

It can be written as a sum of positive squares in 6 ways, for example, as 2722961124 + 61113772944 = 52182^2 + 247212^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63836734061) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4625338 + ... + 4639118.

Almost surely, 2^63836734068 is an apocalyptic number.

63836734068 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63836734068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91507422006).

63836734068 is an abundant number, since it is smaller than the sum of its proper divisors (119178109944).

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

63836734068 is a wasteful number, since it uses less digits than its factorization.

63836734068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13872 (or 13832 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 54.

The spelling of 63836734068 in words is "sixty-three billion, eight hundred thirty-six million, seven hundred thirty-four thousand, sixty-eight".