653542561 has 8 divisors (see below), whose sum is σ = 747128960. Its totient is φ = 560011968.

The previous prime is 653542559. The next prime is 653542573. The reversal of 653542561 is 165245356.

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 653542561 - 2¹ = 653542559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 653542561.

It is not an unprimeable number, because it can be changed into a prime (653542061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15220 + ... + 39226.

It is an arithmetic number, because the mean of its divisors is an integer number (93391120).

Almost surely, 2^653542561 is an apocalyptic number.

It is an amenable number.

653542561 is a deficient number, since it is larger than the sum of its proper divisors (93586399).

653542561 is a wasteful number, since it uses less digits than its factorization.

653542561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27903.

The product of its digits is 108000, while the sum is 37.

The square root of 653542561 is about 25564.4785004506. The cubic root of 653542561 is about 867.8099498436.

The spelling of 653542561 in words is "six hundred fifty-three million, five hundred forty-two thousand, five hundred sixty-one".