55433839397 has 2 divisors, whose sum is σ = 55433839398. Its totient is φ = 55433839396.

The previous prime is 55433839267. The next prime is 55433839427. The reversal of 55433839397 is 79393833455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37990297921 + 17443541476 = 194911^2 + 132074^2 .

It is a cyclic number.

It is not a de Polignac number, because 55433839397 - 2¹⁴ = 55433823013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55433839697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27716919698 + 27716919699.

It is an arithmetic number, because the mean of its divisors is an integer number (27716919699).

Almost surely, 2^55433839397 is an apocalyptic number.

It is an amenable number.

55433839397 is a deficient number, since it is larger than the sum of its proper divisors (1).

55433839397 is an equidigital number, since it uses as much as digits as its factorization.

55433839397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36741600, while the sum is 59.

The spelling of 55433839397 in words is "fifty-five billion, four hundred thirty-three million, eight hundred thirty-nine thousand, three hundred ninety-seven".