55991096549 has 2 divisors, whose sum is σ = 55991096550. Its totient is φ = 55991096548.

The previous prime is 55991096533. The next prime is 55991096683. The reversal of 55991096549 is 94569019955.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55776268900 + 214827649 = 236170^2 + 14657^2 .

It is a cyclic number.

It is not a de Polignac number, because 55991096549 - 2⁴ = 55991096533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55991096491 and 55991096500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55991098549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27995548274 + 27995548275.

It is an arithmetic number, because the mean of its divisors is an integer number (27995548275).

Almost surely, 2^55991096549 is an apocalyptic number.

It is an amenable number.

55991096549 is a deficient number, since it is larger than the sum of its proper divisors (1).

55991096549 is an equidigital number, since it uses as much as digits as its factorization.

55991096549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19683000, while the sum is 62.

The spelling of 55991096549 in words is "fifty-five billion, nine hundred ninety-one million, ninety-six thousand, five hundred forty-nine".