656241225261 has 8 divisors (see below), whose sum is σ = 875031250464. Its totient is φ = 437472675120.

The previous prime is 656241225217. The next prime is 656241225271. The reversal of 656241225261 is 162522142656.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 656241225261 - 2¹⁴ = 656241208877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656241225271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5297326 + ... + 5419791.

It is an arithmetic number, because the mean of its divisors is an integer number (109378906308).

Almost surely, 2^656241225261 is an apocalyptic number.

It is an amenable number.

656241225261 is a deficient number, since it is larger than the sum of its proper divisors (218790025203).

656241225261 is a wasteful number, since it uses less digits than its factorization.

656241225261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10737531.

The product of its digits is 345600, while the sum is 42.

The spelling of 656241225261 in words is "six hundred fifty-six billion, two hundred forty-one million, two hundred twenty-five thousand, two hundred sixty-one".