555561641 has 4 divisors (see below), whose sum is σ = 564978000. Its totient is φ = 546145284.

The previous prime is 555561593. The next prime is 555561659. The reversal of 555561641 is 146165555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146165555 = 5 ⋅29233111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-555561641 is a prime.

It is a super-2 number, since 2×555561641² = 617297473901225762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 555561595 and 555561604.

It is not an unprimeable number, because it can be changed into a prime (555561661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4708091 + ... + 4708208.

It is an arithmetic number, because the mean of its divisors is an integer number (141244500).

Almost surely, 2^555561641 is an apocalyptic number.

It is an amenable number.

555561641 is a deficient number, since it is larger than the sum of its proper divisors (9416359).

555561641 is an equidigital number, since it uses as much as digits as its factorization.

555561641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9416358.

The product of its digits is 90000, while the sum is 38.

The square root of 555561641 is about 23570.3551309691. The cubic root of 555561641 is about 822.0736930318.

The spelling of 555561641 in words is "five hundred fifty-five million, five hundred sixty-one thousand, six hundred forty-one".