6639202154293 has 2 divisors, whose sum is σ = 6639202154294. Its totient is φ = 6639202154292.

The previous prime is 6639202154239. The next prime is 6639202154297. The reversal of 6639202154293 is 3924512029366.

Together with previous prime (6639202154239) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6521475623524 + 117726530769 = 2553718^2 + 343113^2 .

It is a cyclic number.

It is not a de Polignac number, because 6639202154293 - 2²⁹ = 6638665283381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6639202154293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6639202154297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3319601077146 + 3319601077147.

It is an arithmetic number, because the mean of its divisors is an integer number (3319601077147).

Almost surely, 2^{6639202154293} is an apocalyptic number.

It is an amenable number.

6639202154293 is a deficient number, since it is larger than the sum of its proper divisors (1).

6639202154293 is an equidigital number, since it uses as much as digits as its factorization.

6639202154293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4199040, while the sum is 52.

The spelling of 6639202154293 in words is "six trillion, six hundred thirty-nine billion, two hundred two million, one hundred fifty-four thousand, two hundred ninety-three".