3643257265 has 4 divisors (see below), whose sum is σ = 4371908724. Its totient is φ = 2914605808.

The previous prime is 3643257263. The next prime is 3643257313. The reversal of 3643257265 is 5627523463.

3643257265 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5627523463 = 61 ⋅92254483.

It can be written as a sum of positive squares in 2 ways, for example, as 2295559744 + 1347697521 = 47912^2 + 36711^2 .

It is a cyclic number.

It is not a de Polignac number, because 3643257265 - 2¹ = 3643257263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3643257263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364325722 + ... + 364325731.

It is an arithmetic number, because the mean of its divisors is an integer number (1092977181).

Almost surely, 2^3643257265 is an apocalyptic number.

It is an amenable number.

3643257265 is a deficient number, since it is larger than the sum of its proper divisors (728651459).

3643257265 is an equidigital number, since it uses as much as digits as its factorization.

3643257265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728651458.

The product of its digits is 907200, while the sum is 43.

The square root of 3643257265 is about 60359.4008005381. The cubic root of 3643257265 is about 1538.7330425446.

The spelling of 3643257265 in words is "three billion, six hundred forty-three million, two hundred fifty-seven thousand, two hundred sixty-five".