556551606601 has 4 divisors (see below), whose sum is σ = 556591830804. Its totient is φ = 556511382400.

The previous prime is 556551606553. The next prime is 556551606631. The reversal of 556551606601 is 106606155655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106606155655 = 5 ⋅21321231131.

It can be written as a sum of positive squares in 2 ways, for example, as 272437022025 + 284114584576 = 521955^2 + 533024^2 .

It is a cyclic number.

It is not a de Polignac number, because 556551606601 - 2⁷ = 556551606473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556551606631) 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, 20091340 + ... + 20119021.

It is an arithmetic number, because the mean of its divisors is an integer number (139147957701).

Almost surely, 2^556551606601 is an apocalyptic number.

It is an amenable number.

556551606601 is a deficient number, since it is larger than the sum of its proper divisors (40224203).

556551606601 is a wasteful number, since it uses less digits than its factorization.

556551606601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40224202.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 556551606601 in words is "five hundred fifty-six billion, five hundred fifty-one million, six hundred six thousand, six hundred one".