105561240643 has 2 divisors, whose sum is σ = 105561240644. Its totient is φ = 105561240642.

The previous prime is 105561240593. The next prime is 105561240677. The reversal of 105561240643 is 346042165501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105561240643 - 2³³ = 96971306051 is a prime.

It is a super-2 number, since 2×105561240643² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105561243643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52780620321 + 52780620322.

It is an arithmetic number, because the mean of its divisors is an integer number (52780620322).

Almost surely, 2^105561240643 is an apocalyptic number.

105561240643 is a deficient number, since it is larger than the sum of its proper divisors (1).

105561240643 is an equidigital number, since it uses as much as digits as its factorization.

105561240643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 105561240643 in words is "one hundred five billion, five hundred sixty-one million, two hundred forty thousand, six hundred forty-three".