2156744852513 has 2 divisors, whose sum is σ = 2156744852514. Its totient is φ = 2156744852512.

The previous prime is 2156744852501. The next prime is 2156744852623. The reversal of 2156744852513 is 3152584476512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1524096418849 + 632648433664 = 1234543^2 + 795392^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156744852513 - 2⁸ = 2156744852257 is a prime.

It is not a weakly prime, because it can be changed into another prime (2156744852113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078372426256 + 1078372426257.

It is an arithmetic number, because the mean of its divisors is an integer number (1078372426257).

Almost surely, 2^{2156744852513} is an apocalyptic number.

It is an amenable number.

2156744852513 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156744852513 is an equidigital number, since it uses as much as digits as its factorization.

2156744852513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064000, while the sum is 53.

The spelling of 2156744852513 in words is "two trillion, one hundred fifty-six billion, seven hundred forty-four million, eight hundred fifty-two thousand, five hundred thirteen".