63800164563840 has 640 divisors, whose sum is σ = 235436734494720. Its totient is φ = 16447402045440.

The previous prime is 63800164563829. The next prime is 63800164563841. The reversal of 63800164563840 is 4836546100836.

63800164563840 is a `hidden beast` number, since 6 + 38 + 0 + 0 + 1 + 6 + 4 + 563 + 8 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

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 (63800164563841) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1579700127 + ... + 1579740513.

It is an arithmetic number, because the mean of its divisors is an integer number (367869897648).

Almost surely, 2^{63800164563840} is an apocalyptic number.

63800164563840 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 63800164563840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117718367247360).

63800164563840 is an abundant number, since it is smaller than the sum of its proper divisors (171636569930880).

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

63800164563840 is a wasteful number, since it uses less digits than its factorization.

63800164563840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41432 (or 41411 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 54.

The spelling of 63800164563840 in words is "sixty-three trillion, eight hundred billion, one hundred sixty-four million, five hundred sixty-three thousand, eight hundred forty".