755643065 has 4 divisors (see below), whose sum is σ = 906771684. Its totient is φ = 604514448.

The previous prime is 755643043. The next prime is 755643107. The reversal of 755643065 is 560346557.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560346557 = 601 ⋅932357.

It can be written as a sum of positive squares in 2 ways, for example, as 357361216 + 398281849 = 18904^2 + 19957^2 .

It is a cyclic number.

It is not a de Polignac number, because 755643065 - 2²⁶ = 688534201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75564302 + ... + 75564311.

It is an arithmetic number, because the mean of its divisors is an integer number (226692921).

Almost surely, 2^755643065 is an apocalyptic number.

It is an amenable number.

755643065 is a deficient number, since it is larger than the sum of its proper divisors (151128619).

755643065 is a wasteful number, since it uses less digits than its factorization.

755643065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151128618.

The product of its (nonzero) digits is 378000, while the sum is 41.

The square root of 755643065 is about 27488.9626031977. The cubic root of 755643065 is about 910.8333006227.

The spelling of 755643065 in words is "seven hundred fifty-five million, six hundred forty-three thousand, sixty-five".