1680825655 has 8 divisors (see below), whose sum is σ = 2022400512. Its totient is φ = 1341054048.

The previous prime is 1680825647. The next prime is 1680825661. The reversal of 1680825655 is 5565280861.

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 1680825655 - 2³ = 1680825647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 448759 + ... + 452488.

It is an arithmetic number, because the mean of its divisors is an integer number (252800064).

Almost surely, 2^1680825655 is an apocalyptic number.

1680825655 is a deficient number, since it is larger than the sum of its proper divisors (341574857).

1680825655 is an equidigital number, since it uses as much as digits as its factorization.

1680825655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901625.

The product of its (nonzero) digits is 576000, while the sum is 46.

The square root of 1680825655 is about 40997.8737863319. The cubic root of 1680825655 is about 1188.9791058355.

The spelling of 1680825655 in words is "one billion, six hundred eighty million, eight hundred twenty-five thousand, six hundred fifty-five".