690689451868824 has 128 divisors (see below), whose sum is σ = 1735378191037440. Its totient is φ = 229079283535872.

The previous prime is 690689451868811. The next prime is 690689451868883. The reversal of 690689451868824 is 428868154986096.

690689451868824 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×690689451868824² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7569734547 + ... + 7569825789.

It is an arithmetic number, because the mean of its divisors is an integer number (13557642117480).

Almost surely, 2^{690689451868824} is an apocalyptic number.

It is an amenable number.

690689451868824 is an abundant number, since it is smaller than the sum of its proper divisors (1044688739168616).

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

690689451868824 is a wasteful number, since it uses less digits than its factorization.

690689451868824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93569 (or 93565 counting only the distinct ones).

The product of its (nonzero) digits is 11466178560, while the sum is 84.

The spelling of 690689451868824 in words is "six hundred ninety trillion, six hundred eighty-nine billion, four hundred fifty-one million, eight hundred sixty-eight thousand, eight hundred twenty-four".