45778781 has 2 divisors, whose sum is σ = 45778782. Its totient is φ = 45778780.

The previous prime is 45778729. The next prime is 45778787. The reversal of 45778781 is 18787754.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45778756 + 25 = 6766^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 45778781 - 2¹⁴ = 45762397 is a prime.

It is a super-3 number, since 3×45778781³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45778787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22889390 + 22889391.

It is an arithmetic number, because the mean of its divisors is an integer number (22889391).

Almost surely, 2^45778781 is an apocalyptic number.

It is an amenable number.

45778781 is a deficient number, since it is larger than the sum of its proper divisors (1).

45778781 is an equidigital number, since it uses as much as digits as its factorization.

45778781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 439040, while the sum is 47.

The square root of 45778781 is about 6766.0018474724. The cubic root of 45778781 is about 357.7294883331.

The spelling of 45778781 in words is "forty-five million, seven hundred seventy-eight thousand, seven hundred eighty-one".