227487619661 has 2 divisors, whose sum is σ = 227487619662. Its totient is φ = 227487619660.

The previous prime is 227487619643. The next prime is 227487619729. The reversal of 227487619661 is 166916784722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178616116900 + 48871502761 = 422630^2 + 221069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-227487619661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 227487619661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (227987619661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113743809830 + 113743809831.

It is an arithmetic number, because the mean of its divisors is an integer number (113743809831).

Almost surely, 2^227487619661 is an apocalyptic number.

It is an amenable number.

227487619661 is a deficient number, since it is larger than the sum of its proper divisors (1).

227487619661 is an equidigital number, since it uses as much as digits as its factorization.

227487619661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 59.

The spelling of 227487619661 in words is "two hundred twenty-seven billion, four hundred eighty-seven million, six hundred nineteen thousand, six hundred sixty-one".