55650997399 has 2 divisors, whose sum is σ = 55650997400. Its totient is φ = 55650997398.

The previous prime is 55650997393. The next prime is 55650997421. The reversal of 55650997399 is 99379905655.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55650997399 - 2⁹ = 55650996887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55650997393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27825498699 + 27825498700.

It is an arithmetic number, because the mean of its divisors is an integer number (27825498700).

Almost surely, 2^55650997399 is an apocalyptic number.

55650997399 is a deficient number, since it is larger than the sum of its proper divisors (1).

55650997399 is an equidigital number, since it uses as much as digits as its factorization.

55650997399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103335750, while the sum is 67.

The spelling of 55650997399 in words is "fifty-five billion, six hundred fifty million, nine hundred ninety-seven thousand, three hundred ninety-nine".