755648681 has 2 divisors, whose sum is σ = 755648682. Its totient is φ = 755648680.

The previous prime is 755648629. The next prime is 755648701. The reversal of 755648681 is 186846557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 701773081 + 53875600 = 26491^2 + 7340^2 .

It is an emirp because it is prime and its reverse (186846557) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 755648681 - 2⁶ = 755648617 is a prime.

It is a super-2 number, since 2×755648681² = 1142009858194079522, which contains 22 as substring.

It is equal to p_38979554 and since 755648681 and 38979554 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (755648381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 377824340 + 377824341.

It is an arithmetic number, because the mean of its divisors is an integer number (377824341).

Almost surely, 2^755648681 is an apocalyptic number.

It is an amenable number.

755648681 is a deficient number, since it is larger than the sum of its proper divisors (1).

755648681 is an equidigital number, since it uses as much as digits as its factorization.

755648681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1612800, while the sum is 50.

The square root of 755648681 is about 27489.0647530977. The cubic root of 755648681 is about 910.8355570792.

The spelling of 755648681 in words is "seven hundred fifty-five million, six hundred forty-eight thousand, six hundred eighty-one".