689668535448 has 24 divisors (see below), whose sum is σ = 1867852283700. Its totient is φ = 229889511792.

The previous prime is 689668535447. The next prime is 689668535453. The reversal of 689668535448 is 844535866986.

689668535448 is a `hidden beast` number, since 6 + 8 + 96 + 68 + 5 + 35 + 448 = 666.

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

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72), and also a Moran number because the ratio is a prime number: 9578729659 = 689668535448 / (6 + 8 + 9 + 6 + 6 + 8 + 5 + 3 + 5 + 4 + 4 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689668535447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4789364758 + ... + 4789364901.

Almost surely, 2^689668535448 is an apocalyptic number.

It is an amenable number.

689668535448 is an abundant number, since it is smaller than the sum of its proper divisors (1178183748252).

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

689668535448 is a wasteful number, since it uses less digits than its factorization.

689668535448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9578729671 (or 9578729664 counting only the distinct ones).

The product of its digits is 1194393600, while the sum is 72.

The spelling of 689668535448 in words is "six hundred eighty-nine billion, six hundred sixty-eight million, five hundred thirty-five thousand, four hundred forty-eight".