55997661383 has 2 divisors, whose sum is σ = 55997661384. Its totient is φ = 55997661382.

The previous prime is 55997661371. The next prime is 55997661409. The reversal of 55997661383 is 38316679955.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55997661383 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55997661283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27998830691 + 27998830692.

It is an arithmetic number, because the mean of its divisors is an integer number (27998830692).

Almost surely, 2^55997661383 is an apocalyptic number.

55997661383 is a deficient number, since it is larger than the sum of its proper divisors (1).

55997661383 is an equidigital number, since it uses as much as digits as its factorization.

55997661383 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36741600, while the sum is 62.

The spelling of 55997661383 in words is "fifty-five billion, nine hundred ninety-seven million, six hundred sixty-one thousand, three hundred eighty-three".