55537873861 has 2 divisors, whose sum is σ = 55537873862. Its totient is φ = 55537873860.

The previous prime is 55537873843. The next prime is 55537873883. The reversal of 55537873861 is 16837873555.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39678249636 + 15859624225 = 199194^2 + 125935^2 .

It is a cyclic number.

It is not a de Polignac number, because 55537873861 - 2²⁹ = 55001002949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55537873796 and 55537873805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55537873561) 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, 27768936930 + 27768936931.

It is an arithmetic number, because the mean of its divisors is an integer number (27768936931).

Almost surely, 2^55537873861 is an apocalyptic number.

It is an amenable number.

55537873861 is a deficient number, since it is larger than the sum of its proper divisors (1).

55537873861 is an equidigital number, since it uses as much as digits as its factorization.

55537873861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168000, while the sum is 58.

The spelling of 55537873861 in words is "fifty-five billion, five hundred thirty-seven million, eight hundred seventy-three thousand, eight hundred sixty-one".