7645334321 has 2 divisors, whose sum is σ = 7645334322. Its totient is φ = 7645334320.

The previous prime is 7645334317. The next prime is 7645334371. The reversal of 7645334321 is 1234335467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7384996096 + 260338225 = 85936^2 + 16135^2 .

It is an emirp because it is prime and its reverse (1234335467) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7645334321 - 2² = 7645334317 is a prime.

It is a super-2 number, since 2×7645334321² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7645334371) 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 as a sum of consecutive naturals, namely, 3822667160 + 3822667161.

It is an arithmetic number, because the mean of its divisors is an integer number (3822667161).

Almost surely, 2^7645334321 is an apocalyptic number.

It is an amenable number.

7645334321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7645334321 is an equidigital number, since it uses as much as digits as its factorization.

7645334321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 38.

The square root of 7645334321 is about 87437.6024431137. The cubic root of 7645334321 is about 1969.9966778269.

Adding to 7645334321 its reverse (1234335467), we get a palindrome (8879669788).

The spelling of 7645334321 in words is "seven billion, six hundred forty-five million, three hundred thirty-four thousand, three hundred twenty-one".