55661062789 has 2 divisors, whose sum is σ = 55661062790. Its totient is φ = 55661062788.

The previous prime is 55661062763. The next prime is 55661062811. The reversal of 55661062789 is 98726016655.

55661062789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35031485889 + 20629576900 = 187167^2 + 143630^2 .

It is a cyclic number.

It is not a de Polignac number, because 55661062789 - 2²⁵ = 55627508357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55661062729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27830531394 + 27830531395.

It is an arithmetic number, because the mean of its divisors is an integer number (27830531395).

Almost surely, 2^55661062789 is an apocalyptic number.

It is an amenable number.

55661062789 is a deficient number, since it is larger than the sum of its proper divisors (1).

55661062789 is an equidigital number, since it uses as much as digits as its factorization.

55661062789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 55661062789 in words is "fifty-five billion, six hundred sixty-one million, sixty-two thousand, seven hundred eighty-nine".