655555554444403 has 2 divisors, whose sum is σ = 655555554444404. Its totient is φ = 655555554444402.

The previous prime is 655555554444397. The next prime is 655555554444503. The reversal of 655555554444403 is 304444455555556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 655555554444403 - 2⁹ = 655555554443891 is a prime.

It is not a weakly prime, because it can be changed into another prime (655555554444503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327777777222201 + 327777777222202.

It is an arithmetic number, because the mean of its divisors is an integer number (327777777222202).

Almost surely, 2^{655555554444403} is an apocalyptic number.

655555554444403 is a deficient number, since it is larger than the sum of its proper divisors (1).

655555554444403 is an equidigital number, since it uses as much as digits as its factorization.

655555554444403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440000000, while the sum is 64.

The spelling of 655555554444403 in words is "six hundred fifty-five trillion, five hundred fifty-five billion, five hundred fifty-four million, four hundred forty-four thousand, four hundred three".