63587694640 has 40 divisors (see below), whose sum is σ = 149223105360. Its totient is φ = 25197363456.

The previous prime is 63587694637. The next prime is 63587694641. The reversal of 63587694640 is 4649678536.

It is a happy number.

63587694640 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 (40).

It is not an unprimeable number, because it can be changed into a prime (63587694641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3705675 + ... + 3722794.

It is an arithmetic number, because the mean of its divisors is an integer number (3730577634).

Almost surely, 2^63587694640 is an apocalyptic number.

It is an amenable number.

63587694640 is an abundant number, since it is smaller than the sum of its proper divisors (85635410720).

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

63587694640 is a wasteful number, since it uses less digits than its factorization.

63587694640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7428589 (or 7428583 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 58.

The spelling of 63587694640 in words is "sixty-three billion, five hundred eighty-seven million, six hundred ninety-four thousand, six hundred forty".