63774647736 has 128 divisors (see below), whose sum is σ = 169958131200. Its totient is φ = 19903726080.

The previous prime is 63774647683. The next prime is 63774647737.

63774647736 is nontrivially palindromic in base 10.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 63774647736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63774647737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8004891 + ... + 8012853.

It is an arithmetic number, because the mean of its divisors is an integer number (1327797900).

Almost surely, 2^63774647736 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 63774647736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84979065600).

63774647736 is an abundant number, since it is smaller than the sum of its proper divisors (106183483464).

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

63774647736 is a wasteful number, since it uses less digits than its factorization.

63774647736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8349 (or 8345 counting only the distinct ones).

The product of its digits is 74680704, while the sum is 60.

The spelling of 63774647736 in words is "sixty-three billion, seven hundred seventy-four million, six hundred forty-seven thousand, seven hundred thirty-six".