601612256561 has 8 divisors (see below), whose sum is σ = 602218676520. Its totient is φ = 601005944448.

The previous prime is 601612256527. The next prime is 601612256617. The reversal of 601612256561 is 165652216106.

It can be written as a sum of positive squares in 4 ways, for example, as 57285550336 + 544326706225 = 239344^2 + 737785^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-601612256561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (601612256521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15554795 + ... + 15593423.

It is an arithmetic number, because the mean of its divisors is an integer number (75277334565).

Almost surely, 2^601612256561 is an apocalyptic number.

It is an amenable number.

601612256561 is a deficient number, since it is larger than the sum of its proper divisors (606419959).

601612256561 is a wasteful number, since it uses less digits than its factorization.

601612256561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53923.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 601612256561 in words is "six hundred one billion, six hundred twelve million, two hundred fifty-six thousand, five hundred sixty-one".