7641145481 has 2 divisors, whose sum is σ = 7641145482. Its totient is φ = 7641145480.

The previous prime is 7641145439. The next prime is 7641145487. The reversal of 7641145481 is 1845411467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7243541881 + 397603600 = 85109^2 + 19940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7641145481 is a prime.

It is a super-2 number, since 2×7641145481² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7641145487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3820572740 + 3820572741.

It is an arithmetic number, because the mean of its divisors is an integer number (3820572741).

Almost surely, 2^7641145481 is an apocalyptic number.

It is an amenable number.

7641145481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7641145481 is an equidigital number, since it uses as much as digits as its factorization.

7641145481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 41.

The square root of 7641145481 is about 87413.6458512056. The cubic root of 7641145481 is about 1969.6368283608.

The spelling of 7641145481 in words is "seven billion, six hundred forty-one million, one hundred forty-five thousand, four hundred eighty-one".