555156621091 has 2 divisors, whose sum is σ = 555156621092. Its totient is φ = 555156621090.

The previous prime is 555156621067. The next prime is 555156621139. The reversal of 555156621091 is 190126651555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 555156621091 - 2¹⁵ = 555156588323 is a prime.

It is a super-2 number, since 2×555156621091² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (555156621191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277578310545 + 277578310546.

It is an arithmetic number, because the mean of its divisors is an integer number (277578310546).

Almost surely, 2^555156621091 is an apocalyptic number.

555156621091 is a deficient number, since it is larger than the sum of its proper divisors (1).

555156621091 is an equidigital number, since it uses as much as digits as its factorization.

555156621091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405000, while the sum is 46.

The spelling of 555156621091 in words is "five hundred fifty-five billion, one hundred fifty-six million, six hundred twenty-one thousand, ninety-one".