63855001080 has 256 divisors, whose sum is σ = 235420214400. Its totient is φ = 15293214720.

The previous prime is 63855001079. The next prime is 63855001097. The reversal of 63855001080 is 8010055836.

63855001080 is a `hidden beast` number, since 63 + 8 + 5 + 500 + 10 + 80 = 666.

It is a super-3 number, since 3×63855001080³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 458020 + ... + 580940.

Almost surely, 2^63855001080 is an apocalyptic number.

63855001080 is a gapful number since it is divisible by the number (60) 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 63855001080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117710107200).

63855001080 is an abundant number, since it is smaller than the sum of its proper divisors (171565213320).

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

63855001080 is a wasteful number, since it uses less digits than its factorization.

63855001080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122991 (or 122981 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 63855001080 in words is "sixty-three billion, eight hundred fifty-five million, one thousand, eighty".