55645266749 has 2 divisors, whose sum is σ = 55645266750. Its totient is φ = 55645266748.

The previous prime is 55645266739. The next prime is 55645266763. The reversal of 55645266749 is 94766254655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50573263225 + 5072003524 = 224885^2 + 71218^2 .

It is a cyclic number.

It is not a de Polignac number, because 55645266749 - 2³² = 51350299453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55645266739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27822633374 + 27822633375.

It is an arithmetic number, because the mean of its divisors is an integer number (27822633375).

Almost surely, 2^55645266749 is an apocalyptic number.

It is an amenable number.

55645266749 is a deficient number, since it is larger than the sum of its proper divisors (1).

55645266749 is an equidigital number, since it uses as much as digits as its factorization.

55645266749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432000, while the sum is 59.

The spelling of 55645266749 in words is "fifty-five billion, six hundred forty-five million, two hundred sixty-six thousand, seven hundred forty-nine".