55278828528769 has 2 divisors, whose sum is σ = 55278828528770. Its totient is φ = 55278828528768.

The previous prime is 55278828528761. The next prime is 55278828528799. The reversal of 55278828528769 is 96782582887255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54574048130625 + 704780398144 = 7387425^2 + 839512^2 .

It is a cyclic number.

It is not a de Polignac number, because 55278828528769 - 2³ = 55278828528761 is a prime.

It is a super-2 number, since 2×55278828528769² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55278828528692 and 55278828528701.

It is not a weakly prime, because it can be changed into another prime (55278828528761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27639414264384 + 27639414264385.

It is an arithmetic number, because the mean of its divisors is an integer number (27639414264385).

Almost surely, 2^{55278828528769} is an apocalyptic number.

It is an amenable number.

55278828528769 is a deficient number, since it is larger than the sum of its proper divisors (1).

55278828528769 is an equidigital number, since it uses as much as digits as its factorization.

55278828528769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10838016000, while the sum is 82.

The spelling of 55278828528769 in words is "fifty-five trillion, two hundred seventy-eight billion, eight hundred twenty-eight million, five hundred twenty-eight thousand, seven hundred sixty-nine".