63399176064 has 512 divisors, whose sum is σ = 221299200000. Its totient is φ = 17858340864.

The previous prime is 63399176021. The next prime is 63399176081. The reversal of 63399176064 is 46067199336.

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

It is a self number, because there is not a number n which added to its sum of digits gives 63399176064.

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, 93646894 + ... + 93647570.

It is an arithmetic number, because the mean of its divisors is an integer number (432225000).

Almost surely, 2^63399176064 is an apocalyptic number.

63399176064 is a gapful number since it is divisible by the number (64) 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 63399176064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110649600000).

63399176064 is an abundant number, since it is smaller than the sum of its proper divisors (157900023936).

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

63399176064 is an equidigital number, since it uses as much as digits as its factorization.

63399176064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 4408992, while the sum is 54.

The spelling of 63399176064 in words is "sixty-three billion, three hundred ninety-nine million, one hundred seventy-six thousand, sixty-four".