55500055505491 has 2 divisors, whose sum is σ = 55500055505492. Its totient is φ = 55500055505490.

The previous prime is 55500055505437. The next prime is 55500055505527. The reversal of 55500055505491 is 19450555000555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55500055505491 - 2²⁷ = 55499921287763 is a prime.

It is a super-2 number, since 2×55500055505491² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55500055505591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27750027752745 + 27750027752746.

It is an arithmetic number, because the mean of its divisors is an integer number (27750027752746).

Almost surely, 2^{55500055505491} is an apocalyptic number.

55500055505491 is a deficient number, since it is larger than the sum of its proper divisors (1).

55500055505491 is an equidigital number, since it uses as much as digits as its factorization.

55500055505491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2812500, while the sum is 49.

The spelling of 55500055505491 in words is "fifty-five trillion, five hundred billion, fifty-five million, five hundred five thousand, four hundred ninety-one".