42222878658749 has 2 divisors, whose sum is σ = 42222878658750. Its totient is φ = 42222878658748.

The previous prime is 42222878658707. The next prime is 42222878658803. The reversal of 42222878658749 is 94785687822224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25663920325849 + 16558958332900 = 5065957^2 + 4069270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42222878658749 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42222878658349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21111439329374 + 21111439329375.

It is an arithmetic number, because the mean of its divisors is an integer number (21111439329375).

Almost surely, 2^{42222878658749} is an apocalyptic number.

It is an amenable number.

42222878658749 is a deficient number, since it is larger than the sum of its proper divisors (1).

42222878658749 is an equidigital number, since it uses as much as digits as its factorization.

42222878658749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1734082560, while the sum is 74.

The spelling of 42222878658749 in words is "forty-two trillion, two hundred twenty-two billion, eight hundred seventy-eight million, six hundred fifty-eight thousand, seven hundred forty-nine".