42361421867 has 2 divisors, whose sum is σ = 42361421868. Its totient is φ = 42361421866.

The previous prime is 42361421819. The next prime is 42361421929. The reversal of 42361421867 is 76812416324.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42361421867 - 2²⁰ = 42360373291 is a prime.

It is not a weakly prime, because it can be changed into another prime (42361429867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21180710933 + 21180710934.

It is an arithmetic number, because the mean of its divisors is an integer number (21180710934).

Almost surely, 2^42361421867 is an apocalyptic number.

42361421867 is a deficient number, since it is larger than the sum of its proper divisors (1).

42361421867 is an equidigital number, since it uses as much as digits as its factorization.

42361421867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 44.

The spelling of 42361421867 in words is "forty-two billion, three hundred sixty-one million, four hundred twenty-one thousand, eight hundred sixty-seven".