440877656561 has 2 divisors, whose sum is σ = 440877656562. Its totient is φ = 440877656560.

The previous prime is 440877656533. The next prime is 440877656599. The reversal of 440877656561 is 165656778044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 437144446561 + 3733210000 = 661169^2 + 61100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440877656561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 440877656561.

It is not a weakly prime, because it can be changed into another prime (440877656501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220438828280 + 220438828281.

It is an arithmetic number, because the mean of its divisors is an integer number (220438828281).

Almost surely, 2^440877656561 is an apocalyptic number.

It is an amenable number.

440877656561 is a deficient number, since it is larger than the sum of its proper divisors (1).

440877656561 is an equidigital number, since it uses as much as digits as its factorization.

440877656561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33868800, while the sum is 59.

The spelling of 440877656561 in words is "four hundred forty billion, eight hundred seventy-seven million, six hundred fifty-six thousand, five hundred sixty-one".