55785611543 has 2 divisors, whose sum is σ = 55785611544. Its totient is φ = 55785611542.

The previous prime is 55785611477. The next prime is 55785611573. The reversal of 55785611543 is 34511658755.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55785611543 - 2¹⁰ = 55785610519 is a prime.

It is a super-2 number, since 2×55785611543² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55785611491 and 55785611500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55785611573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27892805771 + 27892805772.

It is an arithmetic number, because the mean of its divisors is an integer number (27892805772).

Almost surely, 2^55785611543 is an apocalyptic number.

55785611543 is a deficient number, since it is larger than the sum of its proper divisors (1).

55785611543 is an equidigital number, since it uses as much as digits as its factorization.

55785611543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520000, while the sum is 50.

The spelling of 55785611543 in words is "fifty-five billion, seven hundred eighty-five million, six hundred eleven thousand, five hundred forty-three".