55154666129 has 2 divisors, whose sum is σ = 55154666130. Its totient is φ = 55154666128.

The previous prime is 55154666123. The next prime is 55154666179. The reversal of 55154666129 is 92166645155.

It is an a-pointer prime, because the next prime (55154666179) can be obtained adding 55154666129 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32480329729 + 22674336400 = 180223^2 + 150580^2 .

It is a cyclic number.

It is not a de Polignac number, because 55154666129 - 2¹⁶ = 55154600593 is a prime.

It is not a weakly prime, because it can be changed into another prime (55154666123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27577333064 + 27577333065.

It is an arithmetic number, because the mean of its divisors is an integer number (27577333065).

Almost surely, 2^55154666129 is an apocalyptic number.

It is an amenable number.

55154666129 is a deficient number, since it is larger than the sum of its proper divisors (1).

55154666129 is an equidigital number, since it uses as much as digits as its factorization.

55154666129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944000, while the sum is 50.

The spelling of 55154666129 in words is "fifty-five billion, one hundred fifty-four million, six hundred sixty-six thousand, one hundred twenty-nine".