555500500091 has 2 divisors, whose sum is σ = 555500500092. Its totient is φ = 555500500090.

The previous prime is 555500500007. The next prime is 555500500127. The reversal of 555500500091 is 190005005555.

555500500091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 555500500091 - 2¹⁸ = 555500237947 is a prime.

It is not a weakly prime, because it can be changed into another prime (555500500991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277750250045 + 277750250046.

It is an arithmetic number, because the mean of its divisors is an integer number (277750250046).

Almost surely, 2^555500500091 is an apocalyptic number.

555500500091 is a deficient number, since it is larger than the sum of its proper divisors (1).

555500500091 is an equidigital number, since it uses as much as digits as its factorization.

555500500091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28125, while the sum is 35.

The spelling of 555500500091 in words is "five hundred fifty-five billion, five hundred million, five hundred thousand, ninety-one".