7648751965 has 4 divisors (see below), whose sum is σ = 9178502364. Its totient is φ = 6119001568.

The previous prime is 7648751963. The next prime is 7648751977. The reversal of 7648751965 is 5691578467.

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 6112268761 + 1536483204 = 78181^2 + 39198^2 .

It is a cyclic number.

It is not a de Polignac number, because 7648751965 - 2¹ = 7648751963 is a prime.

It is a super-2 number, since 2×7648751965² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7648751963) 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, 764875192 + ... + 764875201.

It is an arithmetic number, because the mean of its divisors is an integer number (2294625591).

Almost surely, 2^7648751965 is an apocalyptic number.

It is an amenable number.

7648751965 is a deficient number, since it is larger than the sum of its proper divisors (1529750399).

7648751965 is a wasteful number, since it uses less digits than its factorization.

7648751965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529750398.

The product of its digits is 12700800, while the sum is 58.

The square root of 7648751965 is about 87457.1435904466. The cubic root of 7648751965 is about 1970.2901790247.

The spelling of 7648751965 in words is "seven billion, six hundred forty-eight million, seven hundred fifty-one thousand, nine hundred sixty-five".