689238466645 has 8 divisors (see below), whose sum is σ = 831371581656. Its totient is φ = 548533825536.

The previous prime is 689238466643. The next prime is 689238466667. The reversal of 689238466645 is 546664832986.

It can be written as a sum of positive squares in 4 ways, for example, as 90109833489 + 599128633156 = 300183^2 + 774034^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 689238466645 - 2¹ = 689238466643 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 (689238466643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357117412 + ... + 357119341.

It is an arithmetic number, because the mean of its divisors is an integer number (103921447707).

Almost surely, 2^689238466645 is an apocalyptic number.

It is an amenable number.

689238466645 is a deficient number, since it is larger than the sum of its proper divisors (142133115011).

689238466645 is a wasteful number, since it uses less digits than its factorization.

689238466645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714236951.

The product of its digits is 358318080, while the sum is 67.

The spelling of 689238466645 in words is "six hundred eighty-nine billion, two hundred thirty-eight million, four hundred sixty-six thousand, six hundred forty-five".