1680651053 has 4 divisors (see below), whose sum is σ = 1696069980. Its totient is φ = 1665232128.

The previous prime is 1680651047. The next prime is 1680651067. The reversal of 1680651053 is 3501560861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3501560861 = 2903 ⋅1206187.

It can be written as a sum of positive squares in 2 ways, for example, as 1284720649 + 395930404 = 35843^2 + 19898^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1680651053 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 (1680651043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7709300 + ... + 7709517.

It is an arithmetic number, because the mean of its divisors is an integer number (424017495).

Almost surely, 2^1680651053 is an apocalyptic number.

It is an amenable number.

1680651053 is a deficient number, since it is larger than the sum of its proper divisors (15418927).

1680651053 is a wasteful number, since it uses less digits than its factorization.

1680651053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15418926.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 1680651053 is about 40995.7443279177. The cubic root of 1680651053 is about 1188.9379345382.

The spelling of 1680651053 in words is "one billion, six hundred eighty million, six hundred fifty-one thousand, fifty-three".