690011732768 has 18 divisors (see below), whose sum is σ = 1358469850059. Its totient is φ = 345003516896.

The previous prime is 690011732747. The next prime is 690011732777. The reversal of 690011732768 is 867237110096.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

690011732768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 345005866384 + 345005866384 = 587372^2 + 587372^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=587372.

It is a super-2 number, since 2×690011732768² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4625555 + ... + 4772397.

Almost surely, 2^690011732768 is an apocalyptic number.

It is an amenable number.

690011732768 is a deficient number, since it is larger than the sum of its proper divisors (668458117291).

690011732768 is an frugal number, since it uses more digits than its factorization.

690011732768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293696 (or 146845 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 50.

Multiplying 690011732768 by its sum of digits (50), we get a square (34500586638400 = 5873720²).

The spelling of 690011732768 in words is "six hundred ninety billion, eleven million, seven hundred thirty-two thousand, seven hundred sixty-eight".