63734888018 has 4 divisors (see below), whose sum is σ = 95602332030. Its totient is φ = 31867444008.

The previous prime is 63734887973. The next prime is 63734888039. The reversal of 63734888018 is 81088843736.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 60021570049 + 3713317969 = 244993^2 + 60937^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15933722003 + ... + 15933722006.

Almost surely, 2^63734888018 is an apocalyptic number.

63734888018 is a deficient number, since it is larger than the sum of its proper divisors (31867444012).

63734888018 is a wasteful number, since it uses less digits than its factorization.

63734888018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31867444011.

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 63734888018 in words is "sixty-three billion, seven hundred thirty-four million, eight hundred eighty-eight thousand, eighteen".