63978844600 has 96 divisors (see below), whose sum is σ = 162384963840. Its totient is φ = 23249072000.

The previous prime is 63978844597. The next prime is 63978844613. The reversal of 63978844600 is 644887936.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3473415 + ... + 3491785.

It is an arithmetic number, because the mean of its divisors is an integer number (1691510040).

Almost surely, 2^63978844600 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63978844600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81192481920).

63978844600 is an abundant number, since it is smaller than the sum of its proper divisors (98406119240).

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

63978844600 is a wasteful number, since it uses less digits than its factorization.

63978844600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19981 (or 19972 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 63978844600 in words is "sixty-three billion, nine hundred seventy-eight million, eight hundred forty-four thousand, six hundred".