551440020553 has 2 divisors, whose sum is σ = 551440020554. Its totient is φ = 551440020552.

The previous prime is 551440020473. The next prime is 551440020611. The reversal of 551440020553 is 355020044155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338262049609 + 213177970944 = 581603^2 + 461712^2 .

It is a cyclic number.

It is not a de Polignac number, because 551440020553 - 2⁹ = 551440020041 is a prime.

It is not a weakly prime, because it can be changed into another prime (551440020353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275720010276 + 275720010277.

It is an arithmetic number, because the mean of its divisors is an integer number (275720010277).

Almost surely, 2^551440020553 is an apocalyptic number.

It is an amenable number.

551440020553 is a deficient number, since it is larger than the sum of its proper divisors (1).

551440020553 is an equidigital number, since it uses as much as digits as its factorization.

551440020553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60000, while the sum is 34.

The spelling of 551440020553 in words is "five hundred fifty-one billion, four hundred forty million, twenty thousand, five hundred fifty-three".