8632688420781 has 12 divisors (see below), whose sum is σ = 12494228973408. Its totient is φ = 5743684009224.

The previous prime is 8632688420767. The next prime is 8632688420789. The reversal of 8632688420781 is 1870248862368.

8632688420781 is a `hidden beast` number, since 8 + 63 + 2 + 6 + 88 + 420 + 78 + 1 = 666.

It is not a de Polignac number, because 8632688420781 - 2¹⁰ = 8632688419757 is a prime.

It is a super-2 number, since 2×8632688420781² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8632688420789) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 953462275 + ... + 953471328.

It is an arithmetic number, because the mean of its divisors is an integer number (1041185747784).

Almost surely, 2^{8632688420781} is an apocalyptic number.

It is an amenable number.

8632688420781 is a deficient number, since it is larger than the sum of its proper divisors (3861540552627).

8632688420781 is a wasteful number, since it uses less digits than its factorization.

8632688420781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906934112 (or 1906934109 counting only the distinct ones).

The product of its (nonzero) digits is 49545216, while the sum is 63.

The spelling of 8632688420781 in words is "eight trillion, six hundred thirty-two billion, six hundred eighty-eight million, four hundred twenty thousand, seven hundred eighty-one".