688870267845 has 16 divisors (see below), whose sum is σ = 1102249786752. Its totient is φ = 367378356800.

The previous prime is 688870267831. The next prime is 688870267849. The reversal of 688870267845 is 548762078886.

688870267845 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 688870267845 - 2⁶ = 688870267781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 688870267845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688870267849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 894681 + ... + 1475870.

It is an arithmetic number, because the mean of its divisors is an integer number (68890611672).

Almost surely, 2^688870267845 is an apocalyptic number.

It is an amenable number.

688870267845 is a deficient number, since it is larger than the sum of its proper divisors (413379518907).

688870267845 is a wasteful number, since it uses less digits than its factorization.

688870267845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2389932.

The product of its (nonzero) digits is 289013760, while the sum is 69.

The spelling of 688870267845 in words is "six hundred eighty-eight billion, eight hundred seventy million, two hundred sixty-seven thousand, eight hundred forty-five".