1680052571 has 4 divisors (see below), whose sum is σ = 1680136872. Its totient is φ = 1679968272.

The previous prime is 1680052567. The next prime is 1680052589. The reversal of 1680052571 is 1752500861.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1752500861 = 311 ⋅5635051.

It is a cyclic number.

It is not a de Polignac number, because 1680052571 - 2² = 1680052567 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1680052501) 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, 6335 + ... + 58311.

It is an arithmetic number, because the mean of its divisors is an integer number (420034218).

Almost surely, 2^1680052571 is an apocalyptic number.

1680052571 is a deficient number, since it is larger than the sum of its proper divisors (84301).

1680052571 is an equidigital number, since it uses as much as digits as its factorization.

1680052571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84300.

The product of its (nonzero) digits is 16800, while the sum is 35.

The square root of 1680052571 is about 40988.4443593557. Note that the first 3 decimals coincide. The cubic root of 1680052571 is about 1188.7967903408.

The spelling of 1680052571 in words is "one billion, six hundred eighty million, fifty-two thousand, five hundred seventy-one".