55531324577 has 2 divisors, whose sum is σ = 55531324578. Its totient is φ = 55531324576.

The previous prime is 55531324559. The next prime is 55531324609. The reversal of 55531324577 is 77542313555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47646594961 + 7884729616 = 218281^2 + 88796^2 .

It is a cyclic number.

It is not a de Polignac number, because 55531324577 - 2¹⁴ = 55531308193 is a prime.

It is a super-2 number, since 2×55531324577² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55531324547) 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, 27765662288 + 27765662289.

It is an arithmetic number, because the mean of its divisors is an integer number (27765662289).

Almost surely, 2^55531324577 is an apocalyptic number.

It is an amenable number.

55531324577 is a deficient number, since it is larger than the sum of its proper divisors (1).

55531324577 is an equidigital number, since it uses as much as digits as its factorization.

55531324577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2205000, while the sum is 47.

The spelling of 55531324577 in words is "fifty-five billion, five hundred thirty-one million, three hundred twenty-four thousand, five hundred seventy-seven".