652218550409 has 2 divisors, whose sum is σ = 652218550410. Its totient is φ = 652218550408.

The previous prime is 652218550381. The next prime is 652218550429. The reversal of 652218550409 is 904055812256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430992250000 + 221226300409 = 656500^2 + 470347^2 .

It is a cyclic number.

It is not a de Polignac number, because 652218550409 - 2⁸ = 652218550153 is a prime.

It is not a weakly prime, because it can be changed into another prime (652218550429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326109275204 + 326109275205.

It is an arithmetic number, because the mean of its divisors is an integer number (326109275205).

Almost surely, 2^652218550409 is an apocalyptic number.

It is an amenable number.

652218550409 is a deficient number, since it is larger than the sum of its proper divisors (1).

652218550409 is an equidigital number, since it uses as much as digits as its factorization.

652218550409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864000, while the sum is 47.

The spelling of 652218550409 in words is "six hundred fifty-two billion, two hundred eighteen million, five hundred fifty thousand, four hundred nine".