551611561651 has 2 divisors, whose sum is σ = 551611561652. Its totient is φ = 551611561650.

The previous prime is 551611561643. The next prime is 551611561687. The reversal of 551611561651 is 156165116155.

551611561651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 551611561651 - 2³ = 551611561643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551611561598 and 551611561607.

It is not a weakly prime, because it can be changed into another prime (551611561751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275805780825 + 275805780826.

It is an arithmetic number, because the mean of its divisors is an integer number (275805780826).

Almost surely, 2^551611561651 is an apocalyptic number.

551611561651 is a deficient number, since it is larger than the sum of its proper divisors (1).

551611561651 is an equidigital number, since it uses as much as digits as its factorization.

551611561651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135000, while the sum is 43.

The spelling of 551611561651 in words is "five hundred fifty-one billion, six hundred eleven million, five hundred sixty-one thousand, six hundred fifty-one".