243656652469 has 2 divisors, whose sum is σ = 243656652470. Its totient is φ = 243656652468.

The previous prime is 243656652467. The next prime is 243656652487. The reversal of 243656652469 is 964256656342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212831827569 + 30824824900 = 461337^2 + 175570^2 .

It is a cyclic number.

It is not a de Polignac number, because 243656652469 - 2¹ = 243656652467 is a prime.

It is a super-2 number, since 2×243656652469² (a number of 24 digits) contains 22 as substring.

Together with 243656652467, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243656652461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121828326234 + 121828326235.

It is an arithmetic number, because the mean of its divisors is an integer number (121828326235).

Almost surely, 2^243656652469 is an apocalyptic number.

It is an amenable number.

243656652469 is a deficient number, since it is larger than the sum of its proper divisors (1).

243656652469 is an equidigital number, since it uses as much as digits as its factorization.

243656652469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55987200, while the sum is 58.

The spelling of 243656652469 in words is "two hundred forty-three billion, six hundred fifty-six million, six hundred fifty-two thousand, four hundred sixty-nine".