53717661 has 20 divisors (see below), whose sum is σ = 80448544. Its totient is φ = 35721000.

The previous prime is 53717633. The next prime is 53717669. The reversal of 53717661 is 16671735.

It is not a de Polignac number, because 53717661 - 2⁶ = 53717597 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 (53717669) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 50586 + ... + 51636.

Almost surely, 2^53717661 is an apocalyptic number.

It is an amenable number.

53717661 is a deficient number, since it is larger than the sum of its proper divisors (26730883).

53717661 is a wasteful number, since it uses less digits than its factorization.

53717661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694 (or 1685 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 53717661 is about 7329.2333159751. The cubic root of 53717661 is about 377.3164138100.

The spelling of 53717661 in words is "fifty-three million, seven hundred seventeen thousand, six hundred sixty-one".