55564646549 has 2 divisors, whose sum is σ = 55564646550. Its totient is φ = 55564646548.

The previous prime is 55564646537. The next prime is 55564646567. The reversal of 55564646549 is 94564646555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31145896324 + 24418750225 = 176482^2 + 156265^2 .

It is a cyclic number.

It is not a de Polignac number, because 55564646549 - 2¹² = 55564642453 is a prime.

It is a super-2 number, since 2×55564646549² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55564643549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27782323274 + 27782323275.

It is an arithmetic number, because the mean of its divisors is an integer number (27782323275).

Almost surely, 2^55564646549 is an apocalyptic number.

It is an amenable number.

55564646549 is a deficient number, since it is larger than the sum of its proper divisors (1).

55564646549 is an equidigital number, since it uses as much as digits as its factorization.

55564646549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760000, while the sum is 59.

The spelling of 55564646549 in words is "fifty-five billion, five hundred sixty-four million, six hundred forty-six thousand, five hundred forty-nine".