1689210940257 has 12 divisors (see below), whose sum is σ = 2439985342080. Its totient is φ = 1126134172728.

The previous prime is 1689210940253. The next prime is 1689210940267. The reversal of 1689210940257 is 7520490129861.

It is a happy number.

1689210940257 is a `hidden beast` number, since 1 + 6 + 89 + 2 + 109 + 402 + 57 = 666.

It is not a de Polignac number, because 1689210940257 - 2² = 1689210940253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1689210940253) 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 11 ways as a sum of consecutive naturals, for example, 1543788 + ... + 2400354.

It is an arithmetic number, because the mean of its divisors is an integer number (203332111840).

Almost surely, 2^{1689210940257} is an apocalyptic number.

It is an amenable number.

1689210940257 is a deficient number, since it is larger than the sum of its proper divisors (750774401823).

1689210940257 is a wasteful number, since it uses less digits than its factorization.

1689210940257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075692 (or 1075689 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 1689210940257 in words is "one trillion, six hundred eighty-nine billion, two hundred ten million, nine hundred forty thousand, two hundred fifty-seven".