2116456112549 has 2 divisors, whose sum is σ = 2116456112550. Its totient is φ = 2116456112548.

The previous prime is 2116456112509. The next prime is 2116456112567. The reversal of 2116456112549 is 9452116546112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1892324881924 + 224131230625 = 1375618^2 + 473425^2 .

It is a cyclic number.

It is not a de Polignac number, because 2116456112549 - 2⁸ = 2116456112293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2116456112509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058228056274 + 1058228056275.

It is an arithmetic number, because the mean of its divisors is an integer number (1058228056275).

Almost surely, 2^{2116456112549} is an apocalyptic number.

It is an amenable number.

2116456112549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2116456112549 is an equidigital number, since it uses as much as digits as its factorization.

2116456112549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 47.

The spelling of 2116456112549 in words is "two trillion, one hundred sixteen billion, four hundred fifty-six million, one hundred twelve thousand, five hundred forty-nine".