7656465121 has 4 divisors (see below), whose sum is σ = 7673219332. Its totient is φ = 7639710912.

The previous prime is 7656465119. The next prime is 7656465181. The reversal of 7656465121 is 1215646567.

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 3906250000 + 3750215121 = 62500^2 + 61239^2 .

It is a cyclic number.

It is not a de Polignac number, because 7656465121 - 2¹ = 7656465119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7656465181) 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, 8376420 + ... + 8377333.

It is an arithmetic number, because the mean of its divisors is an integer number (1918304833).

Almost surely, 2^7656465121 is an apocalyptic number.

It is an amenable number.

7656465121 is a deficient number, since it is larger than the sum of its proper divisors (16754211).

7656465121 is a wasteful number, since it uses less digits than its factorization.

7656465121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16754210.

The product of its digits is 302400, while the sum is 43.

The square root of 7656465121 is about 87501.2292542225. The cubic root of 7656465121 is about 1970.9522499993.

The spelling of 7656465121 in words is "seven billion, six hundred fifty-six million, four hundred sixty-five thousand, one hundred twenty-one".