688833256445 has 4 divisors (see below), whose sum is σ = 826599907740. Its totient is φ = 551066605152.

The previous prime is 688833256439. The next prime is 688833256547. The reversal of 688833256445 is 544652338886.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 200900271961 + 487932984484 = 448219^2 + 698522^2 .

It is a cyclic number.

It is not a de Polignac number, because 688833256445 - 2⁶ = 688833256381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68883325640 + ... + 68883325649.

It is an arithmetic number, because the mean of its divisors is an integer number (206649976935).

Almost surely, 2^688833256445 is an apocalyptic number.

It is an amenable number.

688833256445 is a deficient number, since it is larger than the sum of its proper divisors (137766651295).

688833256445 is a wasteful number, since it uses less digits than its factorization.

688833256445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137766651294.

The product of its digits is 132710400, while the sum is 62.

The spelling of 688833256445 in words is "six hundred eighty-eight billion, eight hundred thirty-three million, two hundred fifty-six thousand, four hundred forty-five".