42862998809 has 2 divisors, whose sum is σ = 42862998810. Its totient is φ = 42862998808.

The previous prime is 42862998803. The next prime is 42862998821. The reversal of 42862998809 is 90889926824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34499347600 + 8363651209 = 185740^2 + 91453^2 .

It is a cyclic number.

It is not a de Polignac number, because 42862998809 - 2⁸ = 42862998553 is a prime.

It is not a weakly prime, because it can be changed into another prime (42862998803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21431499404 + 21431499405.

It is an arithmetic number, because the mean of its divisors is an integer number (21431499405).

Almost surely, 2^42862998809 is an apocalyptic number.

It is an amenable number.

42862998809 is a deficient number, since it is larger than the sum of its proper divisors (1).

42862998809 is an equidigital number, since it uses as much as digits as its factorization.

42862998809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35831808, while the sum is 65.

The spelling of 42862998809 in words is "forty-two billion, eight hundred sixty-two million, nine hundred ninety-eight thousand, eight hundred nine".