654341561 has 4 divisors (see below), whose sum is σ = 654406800. Its totient is φ = 654276324.

The previous prime is 654341557. The next prime is 654341579. The reversal of 654341561 is 165143456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 654341561 - 2² = 654341557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654341531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14051 + ... + 38808.

It is an arithmetic number, because the mean of its divisors is an integer number (163601700).

Almost surely, 2^654341561 is an apocalyptic number.

It is an amenable number.

654341561 is a deficient number, since it is larger than the sum of its proper divisors (65239).

654341561 is a wasteful number, since it uses less digits than its factorization.

654341561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65238.

The product of its digits is 43200, while the sum is 35.

The square root of 654341561 is about 25580.1008793945. The cubic root of 654341561 is about 868.1634579469.

The spelling of 654341561 in words is "six hundred fifty-four million, three hundred forty-one thousand, five hundred sixty-one".