63728607863 has 4 divisors (see below), whose sum is σ = 67477349520. Its totient is φ = 59979866208.

The previous prime is 63728607857. The next prime is 63728607871. The reversal of 63728607863 is 36870682736.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 63728607863 - 2³⁰ = 62654866039 is a prime.

It is a super-2 number, since 2×63728607863² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63728607799 and 63728607808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63728607823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1874370803 + ... + 1874370836.

It is an arithmetic number, because the mean of its divisors is an integer number (16869337380).

Almost surely, 2^63728607863 is an apocalyptic number.

63728607863 is a deficient number, since it is larger than the sum of its proper divisors (3748741657).

63728607863 is a wasteful number, since it uses less digits than its factorization.

63728607863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3748741656.

The product of its (nonzero) digits is 12192768, while the sum is 56.

The spelling of 63728607863 in words is "sixty-three billion, seven hundred twenty-eight million, six hundred seven thousand, eight hundred sixty-three".