555816321079 has 2 divisors, whose sum is σ = 555816321080. Its totient is φ = 555816321078.

The previous prime is 555816321029. The next prime is 555816321217. The reversal of 555816321079 is 970123618555.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 555816321079 - 2²¹ = 555814223927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555816321029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277908160539 + 277908160540.

It is an arithmetic number, because the mean of its divisors is an integer number (277908160540).

Almost surely, 2^555816321079 is an apocalyptic number.

555816321079 is a deficient number, since it is larger than the sum of its proper divisors (1).

555816321079 is an equidigital number, since it uses as much as digits as its factorization.

555816321079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268000, while the sum is 52.

The spelling of 555816321079 in words is "five hundred fifty-five billion, eight hundred sixteen million, three hundred twenty-one thousand, seventy-nine".