654222243465509 has 2 divisors, whose sum is σ = 654222243465510. Its totient is φ = 654222243465508.

The previous prime is 654222243465499. The next prime is 654222243465611. The reversal of 654222243465509 is 905564342222456.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 498623987412100 + 155598256053409 = 22329890^2 + 12473903^2 .

It is a cyclic number.

It is not a de Polignac number, because 654222243465509 - 2²⁰ = 654222242416933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654222243464509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327111121732754 + 327111121732755.

It is an arithmetic number, because the mean of its divisors is an integer number (327111121732755).

Almost surely, 2^{654222243465509} is an apocalyptic number.

It is an amenable number.

654222243465509 is a deficient number, since it is larger than the sum of its proper divisors (1).

654222243465509 is an equidigital number, since it uses as much as digits as its factorization.

654222243465509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416000, while the sum is 59.

The spelling of 654222243465509 in words is "six hundred fifty-four trillion, two hundred twenty-two billion, two hundred forty-three million, four hundred sixty-five thousand, five hundred nine".