544405645657 has 2 divisors, whose sum is σ = 544405645658. Its totient is φ = 544405645656.

The previous prime is 544405645643. The next prime is 544405645697. The reversal of 544405645657 is 756546504445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351843530896 + 192562114761 = 593164^2 + 438819^2 .

It is a cyclic number.

It is not a de Polignac number, because 544405645657 - 2²⁷ = 544271427929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 544405645598 and 544405645607.

It is not a weakly prime, because it can be changed into another prime (544405645697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272202822828 + 272202822829.

It is an arithmetic number, because the mean of its divisors is an integer number (272202822829).

Almost surely, 2^544405645657 is an apocalyptic number.

It is an amenable number.

544405645657 is a deficient number, since it is larger than the sum of its proper divisors (1).

544405645657 is an equidigital number, since it uses as much as digits as its factorization.

544405645657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320000, while the sum is 55.

The spelling of 544405645657 in words is "five hundred forty-four billion, four hundred five million, six hundred forty-five thousand, six hundred fifty-seven".