63997205400 has 288 divisors, whose sum is σ = 221243808240. Its totient is φ = 16566266880.

The previous prime is 63997205369. The next prime is 63997205413. The reversal of 63997205400 is 450279936.

It is a happy number.

63997205400 is a `hidden beast` number, since 6 + 39 + 9 + 7 + 205 + 400 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 39093382 + ... + 39095018.

Almost surely, 2^63997205400 is an apocalyptic number.

63997205400 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 63997205400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110621904120).

63997205400 is an abundant number, since it is smaller than the sum of its proper divisors (157246602840).

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

63997205400 is a wasteful number, since it uses less digits than its factorization.

63997205400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283 (or 2271 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 63997205400 in words is "sixty-three billion, nine hundred ninety-seven million, two hundred five thousand, four hundred".