63609081768 has 24 divisors (see below), whose sum is σ = 172274596650. Its totient is φ = 21203027232.

The previous prime is 63609081763. The next prime is 63609081799. The reversal of 63609081768 is 86718090636.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 61681696164 + 1927385604 = 248358^2 + 43902^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-3 number, since 3×63609081768³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (63609081763) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 441729663 + ... + 441729806.

Almost surely, 2^63609081768 is an apocalyptic number.

It is an amenable number.

63609081768 is an abundant number, since it is smaller than the sum of its proper divisors (108665514882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63609081768 is a wasteful number, since it uses less digits than its factorization.

63609081768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883459481 (or 883459474 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 63609081768 in words is "sixty-three billion, six hundred nine million, eighty-one thousand, seven hundred sixty-eight".