654063365261 has 2 divisors, whose sum is σ = 654063365262. Its totient is φ = 654063365260.

The previous prime is 654063365243. The next prime is 654063365357. The reversal of 654063365261 is 162563360456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366224677225 + 287838688036 = 605165^2 + 536506^2 .

It is a cyclic number.

It is not a de Polignac number, because 654063365261 - 2¹⁸ = 654063103117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654063364261) 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, 327031682630 + 327031682631.

It is an arithmetic number, because the mean of its divisors is an integer number (327031682631).

Almost surely, 2^654063365261 is an apocalyptic number.

It is an amenable number.

654063365261 is a deficient number, since it is larger than the sum of its proper divisors (1).

654063365261 is an equidigital number, since it uses as much as digits as its factorization.

654063365261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2332800, while the sum is 47.

The spelling of 654063365261 in words is "six hundred fifty-four billion, sixty-three million, three hundred sixty-five thousand, two hundred sixty-one".