55866376499 has 2 divisors, whose sum is σ = 55866376500. Its totient is φ = 55866376498.

The previous prime is 55866376477. The next prime is 55866376519. The reversal of 55866376499 is 99467366855.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55866376499 is a prime.

It is not a weakly prime, because it can be changed into another prime (55866376409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27933188249 + 27933188250.

It is an arithmetic number, because the mean of its divisors is an integer number (27933188250).

Almost surely, 2^55866376499 is an apocalyptic number.

55866376499 is a deficient number, since it is larger than the sum of its proper divisors (1).

55866376499 is an equidigital number, since it uses as much as digits as its factorization.

55866376499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 293932800, while the sum is 68.

The spelling of 55866376499 in words is "fifty-five billion, eight hundred sixty-six million, three hundred seventy-six thousand, four hundred ninety-nine".