1681710551 has 8 divisors (see below), whose sum is σ = 1743865200. Its totient is φ = 1619833600.

The previous prime is 1681710529. The next prime is 1681710581. The reversal of 1681710551 is 1550171861.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1681710551 - 2¹⁰ = 1681709527 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 (1681710581) 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 7 ways as a sum of consecutive naturals, for example, 57050 + ... + 81351.

It is an arithmetic number, because the mean of its divisors is an integer number (217983150).

Almost surely, 2^1681710551 is an apocalyptic number.

1681710551 is a deficient number, since it is larger than the sum of its proper divisors (62154649).

1681710551 is a wasteful number, since it uses less digits than its factorization.

1681710551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138849.

The product of its (nonzero) digits is 8400, while the sum is 35.

The square root of 1681710551 is about 41008.6643406000. The cubic root of 1681710551 is about 1189.1877212206.

The spelling of 1681710551 in words is "one billion, six hundred eighty-one million, seven hundred ten thousand, five hundred fifty-one".