42043263398761 has 2 divisors, whose sum is σ = 42043263398762. Its totient is φ = 42043263398760.

The previous prime is 42043263398753. The next prime is 42043263398833. The reversal of 42043263398761 is 16789336234024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34542478971225 + 7500784427536 = 5877285^2 + 2738756^2 .

It is a cyclic number.

It is not a de Polignac number, because 42043263398761 - 2³ = 42043263398753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42043263398696 and 42043263398705.

It is not a weakly prime, because it can be changed into another prime (42043263398161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21021631699380 + 21021631699381.

It is an arithmetic number, because the mean of its divisors is an integer number (21021631699381).

Almost surely, 2^{42043263398761} is an apocalyptic number.

It is an amenable number.

42043263398761 is a deficient number, since it is larger than the sum of its proper divisors (1).

42043263398761 is an equidigital number, since it uses as much as digits as its factorization.

42043263398761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31352832, while the sum is 58.

The spelling of 42043263398761 in words is "forty-two trillion, forty-three billion, two hundred sixty-three million, three hundred ninety-eight thousand, seven hundred sixty-one".