1689648035146 has 4 divisors (see below), whose sum is σ = 2534472052722. Its totient is φ = 844824017572.

The previous prime is 1689648035143. The next prime is 1689648035149. The reversal of 1689648035146 is 6415308469861.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1689648035143) and next prime (1689648035149).

It can be written as a sum of positive squares in only one way, i.e., 1579232055625 + 110415979521 = 1256675^2 + 332289^2 .

It is not an unprimeable number, because it can be changed into a prime (1689648035143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422412008785 + ... + 422412008788.

Almost surely, 2^{1689648035146} is an apocalyptic number.

1689648035146 is a deficient number, since it is larger than the sum of its proper divisors (844824017576).

1689648035146 is an equidigital number, since it uses as much as digits as its factorization.

1689648035146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844824017575.

The product of its (nonzero) digits is 29859840, while the sum is 61.

The spelling of 1689648035146 in words is "one trillion, six hundred eighty-nine billion, six hundred forty-eight million, thirty-five thousand, one hundred forty-six".