63205323678 has 160 divisors (see below), whose sum is σ = 163627622400. Its totient is φ = 17862296256.

The previous prime is 63205323637. The next prime is 63205323703. The reversal of 63205323678 is 87632350236.

63205323678 is a `hidden beast` number, since 63 + 20 + 532 + 36 + 7 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 89146788 + ... + 89147496.

It is an arithmetic number, because the mean of its divisors is an integer number (1022672640).

Almost surely, 2^63205323678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63205323678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81813811200).

63205323678 is an abundant number, since it is smaller than the sum of its proper divisors (100422298722).

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

63205323678 is a wasteful number, since it uses less digits than its factorization.

63205323678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476 (or 1467 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The spelling of 63205323678 in words is "sixty-three billion, two hundred five million, three hundred twenty-three thousand, six hundred seventy-eight".