55500555491 has 2 divisors, whose sum is σ = 55500555492. Its totient is φ = 55500555490.

The previous prime is 55500555449. The next prime is 55500555521. The reversal of 55500555491 is 19455500555.

55500555491 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 55500555491 - 2¹⁸ = 55500293347 is a prime.

It is not a weakly prime, because it can be changed into another prime (55500552491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27750277745 + 27750277746.

It is an arithmetic number, because the mean of its divisors is an integer number (27750277746).

Almost surely, 2^55500555491 is an apocalyptic number.

55500555491 is a deficient number, since it is larger than the sum of its proper divisors (1).

55500555491 is an equidigital number, since it uses as much as digits as its factorization.

55500555491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 562500, while the sum is 44.

The spelling of 55500555491 in words is "fifty-five billion, five hundred million, five hundred fifty-five thousand, four hundred ninety-one".