623606645551 has 2 divisors, whose sum is σ = 623606645552. Its totient is φ = 623606645550.

The previous prime is 623606645527. The next prime is 623606645681. The reversal of 623606645551 is 155546606326.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 623606645551 - 2⁷ = 623606645423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 623606645495 and 623606645504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623606648551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311803322775 + 311803322776.

It is an arithmetic number, because the mean of its divisors is an integer number (311803322776).

Almost surely, 2^623606645551 is an apocalyptic number.

623606645551 is a deficient number, since it is larger than the sum of its proper divisors (1).

623606645551 is an equidigital number, since it uses as much as digits as its factorization.

623606645551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888000, while the sum is 49.

The spelling of 623606645551 in words is "six hundred twenty-three billion, six hundred six million, six hundred forty-five thousand, five hundred fifty-one".