689981277564 has 24 divisors (see below), whose sum is σ = 1788840349520. Its totient is φ = 229993759152.

The previous prime is 689981277553. The next prime is 689981277581. The reversal of 689981277564 is 465772189986.

It is a junction number, because it is equal to n+sod(n) for n = 689981277492 and 689981277501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3194357659 + ... + 3194357874.

Almost surely, 2^689981277564 is an apocalyptic number.

It is an amenable number.

689981277564 is an abundant number, since it is smaller than the sum of its proper divisors (1098859071956).

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

689981277564 is a wasteful number, since it uses less digits than its factorization.

689981277564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6388715546 (or 6388715538 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 72.

The spelling of 689981277564 in words is "six hundred eighty-nine billion, nine hundred eighty-one million, two hundred seventy-seven thousand, five hundred sixty-four".