7963400899549 has 2 divisors, whose sum is σ = 7963400899550. Its totient is φ = 7963400899548.

The previous prime is 7963400899547. The next prime is 7963400899633. The reversal of 7963400899549 is 9459980043697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7306479302500 + 656921597049 = 2703050^2 + 810507^2 .

It is an emirp because it is prime and its reverse (9459980043697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7963400899549 - 2¹ = 7963400899547 is a prime.

Together with 7963400899547, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7963400899547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3981700449774 + 3981700449775.

It is an arithmetic number, because the mean of its divisors is an integer number (3981700449775).

Almost surely, 2^{7963400899549} is an apocalyptic number.

It is an amenable number.

7963400899549 is a deficient number, since it is larger than the sum of its proper divisors (1).

7963400899549 is an equidigital number, since it uses as much as digits as its factorization.

7963400899549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529079040, while the sum is 73.

The spelling of 7963400899549 in words is "seven trillion, nine hundred sixty-three billion, four hundred million, eight hundred ninety-nine thousand, five hundred forty-nine".