689683698557 has 8 divisors (see below), whose sum is σ = 809512912896. Its totient is φ = 575180227152.

The previous prime is 689683698547. The next prime is 689683698607. The reversal of 689683698557 is 755896386986.

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 689683698557 - 2¹⁸ = 689683436413 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 (689683698547) 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, 1331435453 + ... + 1331435970.

It is an arithmetic number, because the mean of its divisors is an integer number (101189114112).

Almost surely, 2^689683698557 is an apocalyptic number.

It is an amenable number.

689683698557 is a deficient number, since it is larger than the sum of its proper divisors (119829214339).

689683698557 is a wasteful number, since it uses less digits than its factorization.

689683698557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662871467.

The product of its digits is 4702924800, while the sum is 80.

The spelling of 689683698557 in words is "six hundred eighty-nine billion, six hundred eighty-three million, six hundred ninety-eight thousand, five hundred fifty-seven".