689406057705 has 8 divisors (see below), whose sum is σ = 1103049692352. Its totient is φ = 367683230768.

The previous prime is 689406057701. The next prime is 689406057709. The reversal of 689406057705 is 507750604986.

It is an interprime number because it is at equal distance from previous prime (689406057701) and next prime (689406057709).

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 689406057705 - 2² = 689406057701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689406057701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22980201909 + ... + 22980201938.

It is an arithmetic number, because the mean of its divisors is an integer number (137881211544).

Almost surely, 2^689406057705 is an apocalyptic number.

It is an amenable number.

689406057705 is a deficient number, since it is larger than the sum of its proper divisors (413643634647).

689406057705 is a wasteful number, since it uses less digits than its factorization.

689406057705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45960403855.

The product of its (nonzero) digits is 12700800, while the sum is 57.

The spelling of 689406057705 in words is "six hundred eighty-nine billion, four hundred six million, fifty-seven thousand, seven hundred five".