55584070781 has 2 divisors, whose sum is σ = 55584070782. Its totient is φ = 55584070780.

The previous prime is 55584070667. The next prime is 55584070783. The reversal of 55584070781 is 18707048555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32750140900 + 22833929881 = 180970^2 + 151109^2 .

It is a cyclic number.

It is not a de Polignac number, because 55584070781 - 2¹⁰ = 55584069757 is a prime.

It is a super-2 number, since 2×55584070781² (a number of 22 digits) contains 22 as substring.

Together with 55584070783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55584070783) 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, 27792035390 + 27792035391.

It is an arithmetic number, because the mean of its divisors is an integer number (27792035391).

Almost surely, 2^55584070781 is an apocalyptic number.

It is an amenable number.

55584070781 is a deficient number, since it is larger than the sum of its proper divisors (1).

55584070781 is an equidigital number, since it uses as much as digits as its factorization.

55584070781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568000, while the sum is 50.

The spelling of 55584070781 in words is "fifty-five billion, five hundred eighty-four million, seventy thousand, seven hundred eighty-one".