42851020405811 has 2 divisors, whose sum is σ = 42851020405812. Its totient is φ = 42851020405810.

The previous prime is 42851020405793. The next prime is 42851020405883. The reversal of 42851020405811 is 11850402015824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42851020405811 - 2¹⁸ = 42851020143667 is a prime.

It is not a weakly prime, because it can be changed into another prime (42851020405511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21425510202905 + 21425510202906.

It is an arithmetic number, because the mean of its divisors is an integer number (21425510202906).

Almost surely, 2^{42851020405811} is an apocalyptic number.

42851020405811 is a deficient number, since it is larger than the sum of its proper divisors (1).

42851020405811 is an equidigital number, since it uses as much as digits as its factorization.

42851020405811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102400, while the sum is 41.

The spelling of 42851020405811 in words is "forty-two trillion, eight hundred fifty-one billion, twenty million, four hundred five thousand, eight hundred eleven".