551206641551 has 2 divisors, whose sum is σ = 551206641552. Its totient is φ = 551206641550.

The previous prime is 551206641497. The next prime is 551206641613. The reversal of 551206641551 is 155146602155.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551206641551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551206641499 and 551206641508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551206641451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275603320775 + 275603320776.

It is an arithmetic number, because the mean of its divisors is an integer number (275603320776).

Almost surely, 2^551206641551 is an apocalyptic number.

551206641551 is a deficient number, since it is larger than the sum of its proper divisors (1).

551206641551 is an equidigital number, since it uses as much as digits as its factorization.

551206641551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180000, while the sum is 41.

The spelling of 551206641551 in words is "five hundred fifty-one billion, two hundred six million, six hundred forty-one thousand, five hundred fifty-one".