494867653549 has 2 divisors, whose sum is σ = 494867653550. Its totient is φ = 494867653548.

The previous prime is 494867653523. The next prime is 494867653667. The reversal of 494867653549 is 945356768494.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 455143177449 + 39724476100 = 674643^2 + 199310^2 .

It is a cyclic number.

It is not a de Polignac number, because 494867653549 - 2²¹ = 494865556397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (494867653349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247433826774 + 247433826775.

It is an arithmetic number, because the mean of its divisors is an integer number (247433826775).

Almost surely, 2^494867653549 is an apocalyptic number.

It is an amenable number.

494867653549 is a deficient number, since it is larger than the sum of its proper divisors (1).

494867653549 is an equidigital number, since it uses as much as digits as its factorization.

494867653549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 783820800, while the sum is 70.

The spelling of 494867653549 in words is "four hundred ninety-four billion, eight hundred sixty-seven million, six hundred fifty-three thousand, five hundred forty-nine".