42116265449 has 2 divisors, whose sum is σ = 42116265450. Its totient is φ = 42116265448.

The previous prime is 42116265407. The next prime is 42116265463. The reversal of 42116265449 is 94456261124.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29654562025 + 12461703424 = 172205^2 + 111632^2 .

It is a cyclic number.

It is not a de Polignac number, because 42116265449 - 2¹² = 42116261353 is a prime.

It is not a weakly prime, because it can be changed into another prime (42116265349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21058132724 + 21058132725.

It is an arithmetic number, because the mean of its divisors is an integer number (21058132725).

Almost surely, 2^42116265449 is an apocalyptic number.

It is an amenable number.

42116265449 is a deficient number, since it is larger than the sum of its proper divisors (1).

42116265449 is an equidigital number, since it uses as much as digits as its factorization.

42116265449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 44.

The spelling of 42116265449 in words is "forty-two billion, one hundred sixteen million, two hundred sixty-five thousand, four hundred forty-nine".