42194051269 has 2 divisors, whose sum is σ = 42194051270. Its totient is φ = 42194051268.

The previous prime is 42194051261. The next prime is 42194051321. The reversal of 42194051269 is 96215049124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23982548769 + 18211502500 = 154863^2 + 134950^2 .

It is a cyclic number.

It is not a de Polignac number, because 42194051269 - 2³ = 42194051261 is a prime.

It is a super-2 number, since 2×42194051269² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42194051261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21097025634 + 21097025635.

It is an arithmetic number, because the mean of its divisors is an integer number (21097025635).

Almost surely, 2^42194051269 is an apocalyptic number.

It is an amenable number.

42194051269 is a deficient number, since it is larger than the sum of its proper divisors (1).

42194051269 is an equidigital number, since it uses as much as digits as its factorization.

42194051269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 42194051269 in words is "forty-two billion, one hundred ninety-four million, fifty-one thousand, two hundred sixty-nine".