63638686331 has 8 divisors (see below), whose sum is σ = 70060940400. Its totient is φ = 57322585440.

The previous prime is 63638686327. The next prime is 63638686339. The reversal of 63638686331 is 13368683636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63638686331 - 2² = 63638686327 is a prime.

It is a super-2 number, since 2×63638686331² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63638686339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26537036 + ... + 26539433.

It is an arithmetic number, because the mean of its divisors is an integer number (8757617550).

Almost surely, 2^63638686331 is an apocalyptic number.

63638686331 is a deficient number, since it is larger than the sum of its proper divisors (6422254069).

63638686331 is a wasteful number, since it uses less digits than its factorization.

63638686331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53076589.

The product of its digits is 6718464, while the sum is 53.

The spelling of 63638686331 in words is "sixty-three billion, six hundred thirty-eight million, six hundred eighty-six thousand, three hundred thirty-one".