55500551489 has 2 divisors, whose sum is σ = 55500551490. Its totient is φ = 55500551488.

The previous prime is 55500551453. The next prime is 55500551507. The reversal of 55500551489 is 98415500555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40524910864 + 14975640625 = 201308^2 + 122375^2 .

It is a cyclic number.

It is not a de Polignac number, because 55500551489 - 2²⁰ = 55499502913 is a prime.

It is a super-2 number, since 2×55500551489² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55500551089) 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, 27750275744 + 27750275745.

It is an arithmetic number, because the mean of its divisors is an integer number (27750275745).

Almost surely, 2^55500551489 is an apocalyptic number.

It is an amenable number.

55500551489 is a deficient number, since it is larger than the sum of its proper divisors (1).

55500551489 is an equidigital number, since it uses as much as digits as its factorization.

55500551489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900000, while the sum is 47.

The spelling of 55500551489 in words is "fifty-five billion, five hundred million, five hundred fifty-one thousand, four hundred eighty-nine".