42261261851 has 2 divisors, whose sum is σ = 42261261852. Its totient is φ = 42261261850.

The previous prime is 42261261829. The next prime is 42261261883. The reversal of 42261261851 is 15816216224.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42261261851 - 2⁶ = 42261261787 is a prime.

It is not a weakly prime, because it can be changed into another prime (42261261451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21130630925 + 21130630926.

It is an arithmetic number, because the mean of its divisors is an integer number (21130630926).

Almost surely, 2^42261261851 is an apocalyptic number.

42261261851 is a deficient number, since it is larger than the sum of its proper divisors (1).

42261261851 is an equidigital number, since it uses as much as digits as its factorization.

42261261851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 38.

The spelling of 42261261851 in words is "forty-two billion, two hundred sixty-one million, two hundred sixty-one thousand, eight hundred fifty-one".