63643673740 has 24 divisors (see below), whose sum is σ = 133665576912. Its totient is φ = 25454829120.

The previous prime is 63643673729. The next prime is 63643673747. The reversal of 63643673740 is 4737634636.

63643673740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (63643673747) 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, 38767 + ... + 358873.

It is an arithmetic number, because the mean of its divisors is an integer number (5569399038).

Almost surely, 2^63643673740 is an apocalyptic number.

It is an amenable number.

63643673740 is an abundant number, since it is smaller than the sum of its proper divisors (70021903172).

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

63643673740 is a wasteful number, since it uses less digits than its factorization.

63643673740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330057 (or 330055 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 49.

The spelling of 63643673740 in words is "sixty-three billion, six hundred forty-three million, six hundred seventy-three thousand, seven hundred forty".