641656153 has 4 divisors (see below), whose sum is σ = 641762100. Its totient is φ = 641550208.

The previous prime is 641656129. The next prime is 641656193. The reversal of 641656153 is 351656146.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 525188889 + 116467264 = 22917^2 + 10792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641656153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641656123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43300 + ... + 56197.

It is an arithmetic number, because the mean of its divisors is an integer number (160440525).

Almost surely, 2^641656153 is an apocalyptic number.

It is an amenable number.

641656153 is a deficient number, since it is larger than the sum of its proper divisors (105947).

641656153 is an equidigital number, since it uses as much as digits as its factorization.

641656153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105946.

The product of its digits is 64800, while the sum is 37.

The square root of 641656153 is about 25330.9327305569. The cubic root of 641656153 is about 862.5165843762.

The spelling of 641656153 in words is "six hundred forty-one million, six hundred fifty-six thousand, one hundred fifty-three".