688243550967 has 24 divisors (see below), whose sum is σ = 1144321825920. Its totient is φ = 390452657040.

The previous prime is 688243550941. The next prime is 688243550987. The reversal of 688243550967 is 769055342886.

It is a happy number.

688243550967 is a `hidden beast` number, since 6 + 8 + 82 + 43 + 5 + 509 + 6 + 7 = 666.

688243550967 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 688243550967 - 2¹⁶ = 688243485431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688243550987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39288009 + ... + 39305522.

It is an arithmetic number, because the mean of its divisors is an integer number (47680076080).

Almost surely, 2^688243550967 is an apocalyptic number.

688243550967 is a deficient number, since it is larger than the sum of its proper divisors (456078274953).

688243550967 is a wasteful number, since it uses less digits than its factorization.

688243550967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78593683 (or 78593680 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 63.

The spelling of 688243550967 in words is "six hundred eighty-eight billion, two hundred forty-three million, five hundred fifty thousand, nine hundred sixty-seven".