63639123456 has 160 divisors (see below), whose sum is σ = 171032276448. Its totient is φ = 21027225600.

The previous prime is 63639123451. The next prime is 63639123461. The reversal of 63639123456 is 65432193636.

It is a happy number.

63639123456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (63639123451) and next prime (63639123461).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63639123451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158700856 + ... + 158701256.

Almost surely, 2^63639123456 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 63639123456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85516138224).

63639123456 is an abundant number, since it is smaller than the sum of its proper divisors (107393152992).

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

63639123456 is a wasteful number, since it uses less digits than its factorization.

63639123456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072 (or 1056 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 48.

The spelling of 63639123456 in words is "sixty-three billion, six hundred thirty-nine million, one hundred twenty-three thousand, four hundred fifty-six".