7640396443 has 2 divisors, whose sum is σ = 7640396444. Its totient is φ = 7640396442.

The previous prime is 7640396417. The next prime is 7640396471. The reversal of 7640396443 is 3446930467.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7640396443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7640396393 and 7640396402.

It is not a weakly prime, because it can be changed into another prime (7640396483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3820198221 + 3820198222.

It is an arithmetic number, because the mean of its divisors is an integer number (3820198222).

Almost surely, 2^7640396443 is an apocalyptic number.

7640396443 is a deficient number, since it is larger than the sum of its proper divisors (1).

7640396443 is an equidigital number, since it uses as much as digits as its factorization.

7640396443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 46.

The square root of 7640396443 is about 87409.3613007211. The cubic root of 7640396443 is about 1969.5724671101.

The spelling of 7640396443 in words is "seven billion, six hundred forty million, three hundred ninety-six thousand, four hundred forty-three".