2154960247289 has 2 divisors, whose sum is σ = 2154960247290. Its totient is φ = 2154960247288.

The previous prime is 2154960247249. The next prime is 2154960247291. The reversal of 2154960247289 is 9827420694512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1096135711225 + 1058824536064 = 1046965^2 + 1028992^2 .

It is a cyclic number.

It is not a de Polignac number, because 2154960247289 - 2¹² = 2154960243193 is a prime.

Together with 2154960247291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2154960247249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077480123644 + 1077480123645.

It is an arithmetic number, because the mean of its divisors is an integer number (1077480123645).

Almost surely, 2^{2154960247289} is an apocalyptic number.

It is an amenable number.

2154960247289 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154960247289 is an equidigital number, since it uses as much as digits as its factorization.

2154960247289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 2154960247289 in words is "two trillion, one hundred fifty-four billion, nine hundred sixty million, two hundred forty-seven thousand, two hundred eighty-nine".