2616745681489 has 2 divisors, whose sum is σ = 2616745681490. Its totient is φ = 2616745681488.

The previous prime is 2616745681409. The next prime is 2616745681493. The reversal of 2616745681489 is 9841865476162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2440131416464 + 176614265025 = 1562092^2 + 420255^2 .

It is a cyclic number.

It is not a de Polignac number, because 2616745681489 - 2¹⁵ = 2616745648721 is a prime.

It is not a weakly prime, because it can be changed into another prime (2616745681409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1308372840744 + 1308372840745.

It is an arithmetic number, because the mean of its divisors is an integer number (1308372840745).

Almost surely, 2^{2616745681489} is an apocalyptic number.

It is an amenable number.

2616745681489 is a deficient number, since it is larger than the sum of its proper divisors (1).

2616745681489 is an equidigital number, since it uses as much as digits as its factorization.

2616745681489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139345920, while the sum is 67.

The spelling of 2616745681489 in words is "two trillion, six hundred sixteen billion, seven hundred forty-five million, six hundred eighty-one thousand, four hundred eighty-nine".