551555560601 has 2 divisors, whose sum is σ = 551555560602. Its totient is φ = 551555560600.

The previous prime is 551555560573. The next prime is 551555560723. The reversal of 551555560601 is 106065555155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400561144201 + 150994416400 = 632899^2 + 388580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551555560601 is a prime.

It is not a weakly prime, because it can be changed into another prime (551555565601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275777780300 + 275777780301.

It is an arithmetic number, because the mean of its divisors is an integer number (275777780301).

Almost surely, 2^551555560601 is an apocalyptic number.

It is an amenable number.

551555560601 is a deficient number, since it is larger than the sum of its proper divisors (1).

551555560601 is an equidigital number, since it uses as much as digits as its factorization.

551555560601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 562500, while the sum is 44.

The spelling of 551555560601 in words is "five hundred fifty-one billion, five hundred fifty-five million, five hundred sixty thousand, six hundred one".