53516645 has 16 divisors (see below), whose sum is σ = 79040640. Its totient is φ = 33873984.

The previous prime is 53516621. The next prime is 53516647. The reversal of 53516645 is 54661535.

It is a cyclic number.

It is not a de Polignac number, because 53516645 - 2⁸ = 53516389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53516647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58355 + ... + 59264.

It is an arithmetic number, because the mean of its divisors is an integer number (4940040).

Almost surely, 2^53516645 is an apocalyptic number.

It is an amenable number.

53516645 is a deficient number, since it is larger than the sum of its proper divisors (25523995).

53516645 is a wasteful number, since it uses less digits than its factorization.

53516645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117644.

The product of its digits is 54000, while the sum is 35.

The square root of 53516645 is about 7315.5071594524. The cubic root of 53516645 is about 376.8451756104.

The spelling of 53516645 in words is "fifty-three million, five hundred sixteen thousand, six hundred forty-five".