55198454401 has 2 divisors, whose sum is σ = 55198454402. Its totient is φ = 55198454400.

The previous prime is 55198454383. The next prime is 55198454413. The reversal of 55198454401 is 10445489155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49216978801 + 5981475600 = 221849^2 + 77340^2 .

It is a cyclic number.

It is not a de Polignac number, because 55198454401 - 2⁹ = 55198453889 is a prime.

It is not a weakly prime, because it can be changed into another prime (55198454501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27599227200 + 27599227201.

It is an arithmetic number, because the mean of its divisors is an integer number (27599227201).

Almost surely, 2^55198454401 is an apocalyptic number.

It is an amenable number.

55198454401 is a deficient number, since it is larger than the sum of its proper divisors (1).

55198454401 is an equidigital number, since it uses as much as digits as its factorization.

55198454401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576000, while the sum is 46.

The spelling of 55198454401 in words is "fifty-five billion, one hundred ninety-eight million, four hundred fifty-four thousand, four hundred one".