2002402787849 has 2 divisors, whose sum is σ = 2002402787850. Its totient is φ = 2002402787848.

The previous prime is 2002402787839. The next prime is 2002402787863. The reversal of 2002402787849 is 9487872042002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1365726461449 + 636676326400 = 1168643^2 + 797920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2002402787849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2002402787849.

It is not a weakly prime, because it can be changed into another prime (2002402787839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001201393924 + 1001201393925.

It is an arithmetic number, because the mean of its divisors is an integer number (1001201393925).

Almost surely, 2^{2002402787849} is an apocalyptic number.

It is an amenable number.

2002402787849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002402787849 is an equidigital number, since it uses as much as digits as its factorization.

2002402787849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3612672, while the sum is 53.

The spelling of 2002402787849 in words is "two trillion, two billion, four hundred two million, seven hundred eighty-seven thousand, eight hundred forty-nine".