689508510554 has 16 divisors (see below), whose sum is σ = 1035237925800. Its totient is φ = 344429293824.

The previous prime is 689508510553. The next prime is 689508510557. The reversal of 689508510554 is 455015805986.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 672690311329 + 16818199225 = 820177^2 + 129685^2 .

It is a super-2 number, since 2×689508510554² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 689508510554.

It is not an unprimeable number, because it can be changed into a prime (689508510553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18359804 + ... + 18397320.

Almost surely, 2^689508510554 is an apocalyptic number.

689508510554 is a deficient number, since it is larger than the sum of its proper divisors (345729415246).

689508510554 is a wasteful number, since it uses less digits than its factorization.

689508510554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45937.

The product of its (nonzero) digits is 8640000, while the sum is 56.

The spelling of 689508510554 in words is "six hundred eighty-nine billion, five hundred eight million, five hundred ten thousand, five hundred fifty-four".