4398042380261 has 2 divisors, whose sum is σ = 4398042380262. Its totient is φ = 4398042380260.

The previous prime is 4398042380239. The next prime is 4398042380273. The reversal of 4398042380261 is 1620832408934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3752863947361 + 645178432900 = 1937231^2 + 803230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4398042380261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4398042380201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2199021190130 + 2199021190131.

It is an arithmetic number, because the mean of its divisors is an integer number (2199021190131).

Almost surely, 2^{4398042380261} is an apocalyptic number.

It is an amenable number.

4398042380261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4398042380261 is an equidigital number, since it uses as much as digits as its factorization.

4398042380261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1990656, while the sum is 50.

The spelling of 4398042380261 in words is "four trillion, three hundred ninety-eight billion, forty-two million, three hundred eighty thousand, two hundred sixty-one".