55871509049 has 2 divisors, whose sum is σ = 55871509050. Its totient is φ = 55871509048.

The previous prime is 55871508991. The next prime is 55871509063. The reversal of 55871509049 is 94090517855.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49088833600 + 6782675449 = 221560^2 + 82357^2 .

It is a cyclic number.

It is not a de Polignac number, because 55871509049 - 2¹⁶ = 55871443513 is a prime.

It is a super-3 number, since 3×55871509049³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (55871509249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27935754524 + 27935754525.

It is an arithmetic number, because the mean of its divisors is an integer number (27935754525).

Almost surely, 2^55871509049 is an apocalyptic number.

It is an amenable number.

55871509049 is a deficient number, since it is larger than the sum of its proper divisors (1).

55871509049 is an equidigital number, since it uses as much as digits as its factorization.

55871509049 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 53.

The spelling of 55871509049 in words is "fifty-five billion, eight hundred seventy-one million, five hundred nine thousand, forty-nine".