7640396471 has 2 divisors, whose sum is σ = 7640396472. Its totient is φ = 7640396470.

The previous prime is 7640396443. The next prime is 7640396483. The reversal of 7640396471 is 1746930467.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1746930467) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7640396471 is a prime.

It is a super-3 number, since 3×7640396471³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7640398471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3820198235 + 3820198236.

It is an arithmetic number, because the mean of its divisors is an integer number (3820198236).

Almost surely, 2^7640396471 is an apocalyptic number.

7640396471 is a deficient number, since it is larger than the sum of its proper divisors (1).

7640396471 is an equidigital number, since it uses as much as digits as its factorization.

7640396471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 47.

The square root of 7640396471 is about 87409.3614608870. The cubic root of 7640396471 is about 1969.5724695161.

The spelling of 7640396471 in words is "seven billion, six hundred forty million, three hundred ninety-six thousand, four hundred seventy-one".