241780488661 has 2 divisors, whose sum is σ = 241780488662. Its totient is φ = 241780488660.

The previous prime is 241780488643. The next prime is 241780488683. The reversal of 241780488661 is 166884087142.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212511780100 + 29268708561 = 460990^2 + 171081^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-241780488661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (241781488661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120890244330 + 120890244331.

It is an arithmetic number, because the mean of its divisors is an integer number (120890244331).

Almost surely, 2^241780488661 is an apocalyptic number.

It is an amenable number.

241780488661 is a deficient number, since it is larger than the sum of its proper divisors (1).

241780488661 is an equidigital number, since it uses as much as digits as its factorization.

241780488661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4128768, while the sum is 55.

The spelling of 241780488661 in words is "two hundred forty-one billion, seven hundred eighty million, four hundred eighty-eight thousand, six hundred sixty-one".