2115566650679 has 2 divisors, whose sum is σ = 2115566650680. Its totient is φ = 2115566650678.

The previous prime is 2115566650663. The next prime is 2115566650709. The reversal of 2115566650679 is 9760566655112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2115566650679 - 2⁴ = 2115566650663 is a prime.

It is a super-2 number, since 2×2115566650679² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2115566655679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057783325339 + 1057783325340.

It is an arithmetic number, because the mean of its divisors is an integer number (1057783325340).

Almost surely, 2^{2115566650679} is an apocalyptic number.

2115566650679 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115566650679 is an equidigital number, since it uses as much as digits as its factorization.

2115566650679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412000, while the sum is 59.

The spelling of 2115566650679 in words is "two trillion, one hundred fifteen billion, five hundred sixty-six million, six hundred fifty thousand, six hundred seventy-nine".