1680553503 has 6 divisors (see below), whose sum is σ = 2427466184. Its totient is φ = 1120368996.

The previous prime is 1680553481. The next prime is 1680553519. The reversal of 1680553503 is 3053550861.

1680553503 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1680553503 - 2⁵ = 1680553471 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 (1680553703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 93364075 + ... + 93364092.

Almost surely, 2^1680553503 is an apocalyptic number.

1680553503 is a deficient number, since it is larger than the sum of its proper divisors (746912681).

1680553503 is a wasteful number, since it uses less digits than its factorization.

1680553503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186728173 (or 186728170 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 1680553503 is about 40994.5545530135. The cubic root of 1680553503 is about 1188.9149309251.

The spelling of 1680553503 in words is "one billion, six hundred eighty million, five hundred fifty-three thousand, five hundred three".