63813067888770 has 192 divisors, whose sum is σ = 180474046552800. Its totient is φ = 15580422144000.

The previous prime is 63813067888747. The next prime is 63813067888771. The reversal of 63813067888770 is 7788876031836.

63813067888770 is a `hidden beast` number, since 6 + 381 + 30 + 6 + 78 + 8 + 87 + 70 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 12882593528289 + 50930474360481 = 3589233^2 + 7136559^2 .

It is a super-2 number, since 2×63813067888770² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63813067888771) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20435370 + ... + 23350170.

Almost surely, 2^{63813067888770} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63813067888770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90237023276400).

63813067888770 is an abundant number, since it is smaller than the sum of its proper divisors (116660978664030).

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

63813067888770 is a wasteful number, since it uses less digits than its factorization.

63813067888770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915221 (or 2915218 counting only the distinct ones).

The product of its (nonzero) digits is 455196672, while the sum is 72.

The spelling of 63813067888770 in words is "sixty-three trillion, eight hundred thirteen billion, sixty-seven million, eight hundred eighty-eight thousand, seven hundred seventy".