42773718961 has 2 divisors, whose sum is σ = 42773718962. Its totient is φ = 42773718960.

The previous prime is 42773718919. The next prime is 42773719003. The reversal of 42773718961 is 16981737724.

It is a balanced prime because it is at equal distance from previous prime (42773718919) and next prime (42773719003).

It can be written as a sum of positive squares in only one way, i.e., 24862982400 + 17910736561 = 157680^2 + 133831^2 .

It is a cyclic number.

It is not a de Polignac number, because 42773718961 - 2¹⁷ = 42773587889 is a prime.

It is a super-2 number, since 2×42773718961² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42773718161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21386859480 + 21386859481.

It is an arithmetic number, because the mean of its divisors is an integer number (21386859481).

Almost surely, 2^42773718961 is an apocalyptic number.

It is an amenable number.

42773718961 is a deficient number, since it is larger than the sum of its proper divisors (1).

42773718961 is an equidigital number, since it uses as much as digits as its factorization.

42773718961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3556224, while the sum is 55.

The spelling of 42773718961 in words is "forty-two billion, seven hundred seventy-three million, seven hundred eighteen thousand, nine hundred sixty-one".