686046641 has 16 divisors (see below), whose sum is σ = 799588608. Its totient is φ = 576504000.

The previous prime is 686046601. The next prime is 686046643. The reversal of 686046641 is 146640686.

686046641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-686046641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (686046643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68111 + ... + 77531.

It is an arithmetic number, because the mean of its divisors is an integer number (49974288).

Almost surely, 2^686046641 is an apocalyptic number.

It is an amenable number.

686046641 is a deficient number, since it is larger than the sum of its proper divisors (113541967).

686046641 is a wasteful number, since it uses less digits than its factorization.

686046641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9632.

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 686046641 is about 26192.4920731113. The cubic root of 686046641 is about 881.9647222210.

The spelling of 686046641 in words is "six hundred eighty-six million, forty-six thousand, six hundred forty-one".