690468321081 has 48 divisors (see below), whose sum is σ = 1224515601792. Its totient is φ = 337585712640.

The previous prime is 690468321073. The next prime is 690468321083. The reversal of 690468321081 is 180123864096.

690468321081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 690468321081 - 2³ = 690468321073 is a prime.

It is a super-2 number, since 2×690468321081² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 690468321081.

It is not an unprimeable number, because it can be changed into a prime (690468321083) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7948890 + ... + 8035283.

It is an arithmetic number, because the mean of its divisors is an integer number (25510741704).

Almost surely, 2^690468321081 is an apocalyptic number.

It is an amenable number.

690468321081 is a deficient number, since it is larger than the sum of its proper divisors (534047280711).

690468321081 is a wasteful number, since it uses less digits than its factorization.

690468321081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15984222 (or 15984211 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The spelling of 690468321081 in words is "six hundred ninety billion, four hundred sixty-eight million, three hundred twenty-one thousand, eighty-one".