2115571559797 has 2 divisors, whose sum is σ = 2115571559798. Its totient is φ = 2115571559796.

The previous prime is 2115571559771. The next prime is 2115571559851. The reversal of 2115571559797 is 7979551755112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1639152726436 + 476418833361 = 1280294^2 + 690231^2 .

It is a cyclic number.

It is not a de Polignac number, because 2115571559797 - 2¹⁵ = 2115571527029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2115571554797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057785779898 + 1057785779899.

It is an arithmetic number, because the mean of its divisors is an integer number (1057785779899).

Almost surely, 2^{2115571559797} is an apocalyptic number.

It is an amenable number.

2115571559797 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115571559797 is an equidigital number, since it uses as much as digits as its factorization.

2115571559797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34728750, while the sum is 64.

The spelling of 2115571559797 in words is "two trillion, one hundred fifteen billion, five hundred seventy-one million, five hundred fifty-nine thousand, seven hundred ninety-seven".