655243844407 has 2 divisors, whose sum is σ = 655243844408. Its totient is φ = 655243844406.

The previous prime is 655243844399. The next prime is 655243844467. The reversal of 655243844407 is 704448342556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 655243844407 - 2³ = 655243844399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655243844467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327621922203 + 327621922204.

It is an arithmetic number, because the mean of its divisors is an integer number (327621922204).

Almost surely, 2^655243844407 is an apocalyptic number.

655243844407 is a deficient number, since it is larger than the sum of its proper divisors (1).

655243844407 is an equidigital number, since it uses as much as digits as its factorization.

655243844407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12902400, while the sum is 52.

The spelling of 655243844407 in words is "six hundred fifty-five billion, two hundred forty-three million, eight hundred forty-four thousand, four hundred seven".