55555501129 has 2 divisors, whose sum is σ = 55555501130. Its totient is φ = 55555501128.

The previous prime is 55555501093. The next prime is 55555501241. The reversal of 55555501129 is 92110555555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47247543225 + 8307957904 = 217365^2 + 91148^2 .

It is a cyclic number.

It is not a de Polignac number, because 55555501129 - 2²¹ = 55553403977 is a prime.

It is a super-3 number, since 3×55555501129³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (55555502129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777750564 + 27777750565.

It is an arithmetic number, because the mean of its divisors is an integer number (27777750565).

Almost surely, 2^55555501129 is an apocalyptic number.

It is an amenable number.

55555501129 is a deficient number, since it is larger than the sum of its proper divisors (1).

55555501129 is an equidigital number, since it uses as much as digits as its factorization.

55555501129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 281250, while the sum is 43.

The spelling of 55555501129 in words is "fifty-five billion, five hundred fifty-five million, five hundred one thousand, one hundred twenty-nine".