7645240809265 has 4 divisors (see below), whose sum is σ = 9174288971124. Its totient is φ = 6116192647408.

The previous prime is 7645240809263. The next prime is 7645240809293. The reversal of 7645240809265 is 5629080425467.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 993004278016 + 6652236531249 = 996496^2 + 2579193^2 .

It is a cyclic number.

It is not a de Polignac number, because 7645240809265 - 2¹ = 7645240809263 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7645240809263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764524080922 + ... + 764524080931.

It is an arithmetic number, because the mean of its divisors is an integer number (2293572242781).

Almost surely, 2^{7645240809265} is an apocalyptic number.

It is an amenable number.

7645240809265 is a deficient number, since it is larger than the sum of its proper divisors (1529048161859).

7645240809265 is a wasteful number, since it uses less digits than its factorization.

7645240809265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529048161858.

The product of its (nonzero) digits is 29030400, while the sum is 58.

The spelling of 7645240809265 in words is "seven trillion, six hundred forty-five billion, two hundred forty million, eight hundred nine thousand, two hundred sixty-five".