689238466644 has 144 divisors (see below), whose sum is σ = 2079687998976. Its totient is φ = 175913337600.

The previous prime is 689238466643. The next prime is 689238466667. The reversal of 689238466644 is 446664832986.

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 47 ways as a sum of consecutive naturals, for example, 1217347 + ... + 1691274.

Almost surely, 2^689238466644 is an apocalyptic number.

It is an amenable number.

689238466644 is an abundant number, since it is smaller than the sum of its proper divisors (1390449532332).

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

689238466644 is a wasteful number, since it uses less digits than its factorization.

689238466644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908686 (or 2908677 counting only the distinct ones).

The product of its digits is 286654464, while the sum is 66.

The spelling of 689238466644 in words is "six hundred eighty-nine billion, two hundred thirty-eight million, four hundred sixty-six thousand, six hundred forty-four".