63609264544 has 144 divisors (see below), whose sum is σ = 149940596232. Its totient is φ = 26466435072.

The previous prime is 63609264539. The next prime is 63609264583. The reversal of 63609264544 is 44546290636.

63609264544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 50616000400 + 12993264144 = 224980^2 + 113988^2 .

It is a super-2 number, since 2×63609264544² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

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, 35794984 + ... + 35796760.

Almost surely, 2^63609264544 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 63609264544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74970298116).

63609264544 is an abundant number, since it is smaller than the sum of its proper divisors (86331331688).

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

63609264544 is a wasteful number, since it uses less digits than its factorization.

63609264544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 49.

The spelling of 63609264544 in words is "sixty-three billion, six hundred nine million, two hundred sixty-four thousand, five hundred forty-four".