561551098429423 has 2 divisors, whose sum is σ = 561551098429424. Its totient is φ = 561551098429422.

The previous prime is 561551098429381. The next prime is 561551098429481. The reversal of 561551098429423 is 324924890155165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561551098429423 - 2¹³ = 561551098421231 is a prime.

It is a super-2 number, since 2×561551098429423² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561551098429493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (37) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280775549214711 + 280775549214712.

It is an arithmetic number, because the mean of its divisors is an integer number (280775549214712).

Almost surely, 2^{561551098429423} is an apocalyptic number.

561551098429423 is a deficient number, since it is larger than the sum of its proper divisors (1).

561551098429423 is an equidigital number, since it uses as much as digits as its factorization.

561551098429423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312000, while the sum is 64.

The spelling of 561551098429423 in words is "five hundred sixty-one trillion, five hundred fifty-one billion, ninety-eight million, four hundred twenty-nine thousand, four hundred twenty-three".