1689764553 has 12 divisors (see below), whose sum is σ = 2441602800. Its totient is φ = 1126125816.

The previous prime is 1689764519. The next prime is 1689764561. The reversal of 1689764553 is 3554679861.

1689764553 is a `hidden beast` number, since 1 + 6 + 89 + 7 + 6 + 4 + 553 = 666.

1689764553 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-1689764553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1689764553.

It is not an unprimeable number, because it can be changed into a prime (1689764353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2703 + ... + 58196.

It is an arithmetic number, because the mean of its divisors is an integer number (203466900).

Almost surely, 2^1689764553 is an apocalyptic number.

It is an amenable number.

1689764553 is a deficient number, since it is larger than the sum of its proper divisors (751838247).

1689764553 is a wasteful number, since it uses less digits than its factorization.

1689764553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63988 (or 63985 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The square root of 1689764553 is about 41106.7458332571. The cubic root of 1689764553 is about 1191.0831070517.

The spelling of 1689764553 in words is "one billion, six hundred eighty-nine million, seven hundred sixty-four thousand, five hundred fifty-three".