63432597665 has 8 divisors (see below), whose sum is σ = 76278032640. Its totient is φ = 50640134512.

The previous prime is 63432597661. The next prime is 63432597677. The reversal of 63432597665 is 56679523436.

It is a happy number.

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 63432597665 - 2² = 63432597661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63432597665.

It is not an unprimeable number, because it can be changed into a prime (63432597661) 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, 13240319 + ... + 13245108.

It is an arithmetic number, because the mean of its divisors is an integer number (9534754080).

Almost surely, 2^63432597665 is an apocalyptic number.

It is an amenable number.

63432597665 is a deficient number, since it is larger than the sum of its proper divisors (12845434975).

63432597665 is a wasteful number, since it uses less digits than its factorization.

63432597665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26485911.

The product of its digits is 24494400, while the sum is 56.

The spelling of 63432597665 in words is "sixty-three billion, four hundred thirty-two million, five hundred ninety-seven thousand, six hundred sixty-five".