7641145439 has 2 divisors, whose sum is σ = 7641145440. Its totient is φ = 7641145438.

The previous prime is 7641145433. The next prime is 7641145481. The reversal of 7641145439 is 9345411467.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7641145439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7641145439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7641145433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3820572719 + 3820572720.

It is an arithmetic number, because the mean of its divisors is an integer number (3820572720).

Almost surely, 2^7641145439 is an apocalyptic number.

7641145439 is a deficient number, since it is larger than the sum of its proper divisors (1).

7641145439 is an equidigital number, since it uses as much as digits as its factorization.

7641145439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The square root of 7641145439 is about 87413.6456109685. The cubic root of 7641145439 is about 1969.6368247521.

The spelling of 7641145439 in words is "seven billion, six hundred forty-one million, one hundred forty-five thousand, four hundred thirty-nine".