63965819885 has 8 divisors (see below), whose sum is σ = 83737073376. Its totient is φ = 46520596240.

The previous prime is 63965819867. The next prime is 63965819887. The reversal of 63965819885 is 58891856936.

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

It is not a de Polignac number, because 63965819885 - 2⁸ = 63965819629 is a prime.

It is a super-2 number, since 2×63965819885² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63965819887) 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, 581507399 + ... + 581507508.

It is an arithmetic number, because the mean of its divisors is an integer number (10467134172).

Almost surely, 2^63965819885 is an apocalyptic number.

It is an amenable number.

63965819885 is a deficient number, since it is larger than the sum of its proper divisors (19771253491).

63965819885 is a wasteful number, since it uses less digits than its factorization.

63965819885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163014923.

The product of its digits is 111974400, while the sum is 68.

The spelling of 63965819885 in words is "sixty-three billion, nine hundred sixty-five million, eight hundred nineteen thousand, eight hundred eighty-five".