651544660606423 has 2 divisors, whose sum is σ = 651544660606424. Its totient is φ = 651544660606422.

The previous prime is 651544660606243. The next prime is 651544660606451. The reversal of 651544660606423 is 324606066445156.

Together with previous prime (651544660606243) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 651544660606423 - 2³³ = 651536070671831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651544660606223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325772330303211 + 325772330303212.

It is an arithmetic number, because the mean of its divisors is an integer number (325772330303212).

Almost surely, 2^{651544660606423} is an apocalyptic number.

651544660606423 is a deficient number, since it is larger than the sum of its proper divisors (1).

651544660606423 is an equidigital number, since it uses as much as digits as its factorization.

651544660606423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74649600, while the sum is 58.

The spelling of 651544660606423 in words is "six hundred fifty-one trillion, five hundred forty-four billion, six hundred sixty million, six hundred six thousand, four hundred twenty-three".