6503616742991 has 2 divisors, whose sum is σ = 6503616742992. Its totient is φ = 6503616742990.

The previous prime is 6503616742979. The next prime is 6503616742999. The reversal of 6503616742991 is 1992476163056.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6503616742991 - 2¹⁰ = 6503616741967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6503616742991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6503616742999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3251808371495 + 3251808371496.

It is an arithmetic number, because the mean of its divisors is an integer number (3251808371496).

Almost surely, 2^{6503616742991} is an apocalyptic number.

6503616742991 is a deficient number, since it is larger than the sum of its proper divisors (1).

6503616742991 is an equidigital number, since it uses as much as digits as its factorization.

6503616742991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14696640, while the sum is 59.

The spelling of 6503616742991 in words is "six trillion, five hundred three billion, six hundred sixteen million, seven hundred forty-two thousand, nine hundred ninety-one".