42261261829 has 2 divisors, whose sum is σ = 42261261830. Its totient is φ = 42261261828.

The previous prime is 42261261827. The next prime is 42261261851. The reversal of 42261261829 is 92816216224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24790502500 + 17470759329 = 157450^2 + 132177^2 .

It is a cyclic number.

It is not a de Polignac number, because 42261261829 - 2¹ = 42261261827 is a prime.

Together with 42261261827, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42261261827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21130630914 + 21130630915.

It is an arithmetic number, because the mean of its divisors is an integer number (21130630915).

Almost surely, 2^42261261829 is an apocalyptic number.

It is an amenable number.

42261261829 is a deficient number, since it is larger than the sum of its proper divisors (1).

42261261829 is an equidigital number, since it uses as much as digits as its factorization.

42261261829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 43.

The spelling of 42261261829 in words is "forty-two billion, two hundred sixty-one million, two hundred sixty-one thousand, eight hundred twenty-nine".