7268455781 has 2 divisors, whose sum is σ = 7268455782. Its totient is φ = 7268455780.

The previous prime is 7268455717. The next prime is 7268455801. The reversal of 7268455781 is 1875548627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6762430756 + 506025025 = 82234^2 + 22495^2 .

It is a cyclic number.

It is not a de Polignac number, because 7268455781 - 2⁶ = 7268455717 is a prime.

It is a super-2 number, since 2×7268455781² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7268455081) 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, 3634227890 + 3634227891.

It is an arithmetic number, because the mean of its divisors is an integer number (3634227891).

Almost surely, 2^7268455781 is an apocalyptic number.

It is an amenable number.

7268455781 is a deficient number, since it is larger than the sum of its proper divisors (1).

7268455781 is an equidigital number, since it uses as much as digits as its factorization.

7268455781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3763200, while the sum is 53.

The square root of 7268455781 is about 85255.2390237691. The cubic root of 7268455781 is about 1937.0792287572.

The spelling of 7268455781 in words is "seven billion, two hundred sixty-eight million, four hundred fifty-five thousand, seven hundred eighty-one".