656328041 has 6 divisors (see below), whose sum is σ = 672504126. Its totient is φ = 640160000.

The previous prime is 656328019. The next prime is 656328053. The reversal of 656328041 is 140823656.

It can be written as a sum of positive squares in 3 ways, for example, as 136305625 + 520022416 = 11675^2 + 22804^2 .

It is not a de Polignac number, because 656328041 - 2¹⁸ = 656065897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 656327992 and 656328010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656328011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 162041 + ... + 166041.

It is an arithmetic number, because the mean of its divisors is an integer number (112084021).

Almost surely, 2^656328041 is an apocalyptic number.

It is an amenable number.

656328041 is a deficient number, since it is larger than the sum of its proper divisors (16176085).

656328041 is an frugal number, since it uses more digits than its factorization.

656328041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8043 (or 4042 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 656328041 is about 25618.9000739688. The cubic root of 656328041 is about 869.0411071699.

The spelling of 656328041 in words is "six hundred fifty-six million, three hundred twenty-eight thousand, forty-one".