63747323136 has 576 divisors, whose sum is σ = 222047078400. Its totient is φ = 17665081344.

The previous prime is 63747323131. The next prime is 63747323137. The reversal of 63747323136 is 63132374736.

63747323136 is a `hidden beast` number, since 637 + 4 + 7 + 3 + 2 + 3 + 1 + 3 + 6 = 666.

63747323136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (576).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 63747323091 and 63747323100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63747323131) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 391087791 + ... + 391087953.

It is an arithmetic number, because the mean of its divisors is an integer number (385498400).

Almost surely, 2^63747323136 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 63747323136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111023539200).

63747323136 is an abundant number, since it is smaller than the sum of its proper divisors (158299755264).

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

63747323136 is a wasteful number, since it uses less digits than its factorization.

63747323136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391 (or 371 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 45.

The spelling of 63747323136 in words is "sixty-three billion, seven hundred forty-seven million, three hundred twenty-three thousand, one hundred thirty-six".