63617399985 has 8 divisors (see below), whose sum is σ = 101787840000. Its totient is φ = 33929279984.

The previous prime is 63617399981. The next prime is 63617399987. The reversal of 63617399985 is 58999371636.

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 63617399985 - 2² = 63617399981 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63617399981) 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, 2120579985 + ... + 2120580014.

It is an arithmetic number, because the mean of its divisors is an integer number (12723480000).

Almost surely, 2^63617399985 is an apocalyptic number.

It is an amenable number.

63617399985 is a deficient number, since it is larger than the sum of its proper divisors (38170440015).

63617399985 is a wasteful number, since it uses less digits than its factorization.

63617399985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4241160007.

The product of its digits is 66134880, while the sum is 66.

The spelling of 63617399985 in words is "sixty-three billion, six hundred seventeen million, three hundred ninety-nine thousand, nine hundred eighty-five".