2405740473781 has 2 divisors, whose sum is σ = 2405740473782. Its totient is φ = 2405740473780.

The previous prime is 2405740473701. The next prime is 2405740473809. The reversal of 2405740473781 is 1873740475042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1535641424100 + 870099049681 = 1239210^2 + 932791^2 .

It is a cyclic number.

It is not a de Polignac number, because 2405740473781 - 2¹⁹ = 2405739949493 is a prime.

It is a super-2 number, since 2×2405740473781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2405740473701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1202870236890 + 1202870236891.

It is an arithmetic number, because the mean of its divisors is an integer number (1202870236891).

Almost surely, 2^{2405740473781} is an apocalyptic number.

It is an amenable number.

2405740473781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2405740473781 is an equidigital number, since it uses as much as digits as its factorization.

2405740473781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5268480, while the sum is 52.

The spelling of 2405740473781 in words is "two trillion, four hundred five billion, seven hundred forty million, four hundred seventy-three thousand, seven hundred eighty-one".