7641511265 has 4 divisors (see below), whose sum is σ = 9169813524. Its totient is φ = 6113209008.

The previous prime is 7641511259. The next prime is 7641511279. The reversal of 7641511265 is 5621151467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5621151467 = 11243 ⋅499969.

It can be written as a sum of positive squares in 2 ways, for example, as 1135959616 + 6505551649 = 33704^2 + 80657^2 .

It is a cyclic number.

It is not a de Polignac number, because 7641511265 - 2¹² = 7641507169 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 764151122 + ... + 764151131.

It is an arithmetic number, because the mean of its divisors is an integer number (2292453381).

Almost surely, 2^7641511265 is an apocalyptic number.

It is an amenable number.

7641511265 is a deficient number, since it is larger than the sum of its proper divisors (1528302259).

7641511265 is a wasteful number, since it uses less digits than its factorization.

7641511265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528302258.

The product of its digits is 50400, while the sum is 38.

The square root of 7641511265 is about 87415.7380853128. The cubic root of 7641511265 is about 1969.6682569009.

The spelling of 7641511265 in words is "seven billion, six hundred forty-one million, five hundred eleven thousand, two hundred sixty-five".