689006257056 has 72 divisors (see below), whose sum is σ = 2110081673700. Its totient is φ = 212001924096.

The previous prime is 689006257007. The next prime is 689006257057. The reversal of 689006257056 is 650752600986.

It is a happy number.

689006257056 is a `hidden beast` number, since 6 + 8 + 9 + 0 + 0 + 62 + 570 + 5 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 687433341456 + 1572915600 = 829116^2 + 39660^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a junction number, because it is equal to n+sod(n) for n = 689006256993 and 689006257011.

It is not an unprimeable number, because it can be changed into a prime (689006257057) 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, 92010981 + ... + 92018468.

Almost surely, 2^689006257056 is an apocalyptic number.

It is an amenable number.

689006257056 is an abundant number, since it is smaller than the sum of its proper divisors (1421075416644).

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

689006257056 is a wasteful number, since it uses less digits than its factorization.

689006257056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184029478 (or 184029467 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 689006257056 in words is "six hundred eighty-nine billion, six million, two hundred fifty-seven thousand, fifty-six".