688670047295999 has 4 divisors (see below), whose sum is σ = 701663821773336. Its totient is φ = 675676272818664.

The previous prime is 688670047295983. The next prime is 688670047296053. The reversal of 688670047295999 is 999592740076886.

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

It is a cyclic number.

It is not a de Polignac number, because 688670047295999 - 2⁴ = 688670047295983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688670047295299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6496887238589 + ... + 6496887238694.

It is an arithmetic number, because the mean of its divisors is an integer number (175415955443334).

Almost surely, 2^{688670047295999} is an apocalyptic number.

688670047295999 is a deficient number, since it is larger than the sum of its proper divisors (12993774477337).

688670047295999 is a wasteful number, since it uses less digits than its factorization.

688670047295999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12993774477336.

The product of its (nonzero) digits is 29628426240, while the sum is 89.

The spelling of 688670047295999 in words is "six hundred eighty-eight trillion, six hundred seventy billion, forty-seven million, two hundred ninety-five thousand, nine hundred ninety-nine".