42776494169 has 2 divisors, whose sum is σ = 42776494170. Its totient is φ = 42776494168.

The previous prime is 42776494157. The next prime is 42776494177. The reversal of 42776494169 is 96149467724.

42776494169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32584582144 + 10191912025 = 180512^2 + 100955^2 .

It is a cyclic number.

It is not a de Polignac number, because 42776494169 - 2⁴ = 42776494153 is a prime.

It is a super-2 number, since 2×42776494169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42776494469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21388247084 + 21388247085.

It is an arithmetic number, because the mean of its divisors is an integer number (21388247085).

Almost surely, 2^42776494169 is an apocalyptic number.

It is an amenable number.

42776494169 is a deficient number, since it is larger than the sum of its proper divisors (1).

42776494169 is an equidigital number, since it uses as much as digits as its factorization.

42776494169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 59.

The spelling of 42776494169 in words is "forty-two billion, seven hundred seventy-six million, four hundred ninety-four thousand, one hundred sixty-nine".