2157738066433 has 2 divisors, whose sum is σ = 2157738066434. Its totient is φ = 2157738066432.

The previous prime is 2157738066431. The next prime is 2157738066437. The reversal of 2157738066433 is 3346608377512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1188649423504 + 969088642929 = 1090252^2 + 984423^2 .

It is a cyclic number.

It is not a de Polignac number, because 2157738066433 - 2¹ = 2157738066431 is a prime.

Together with 2157738066431, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2157738066431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078869033216 + 1078869033217.

It is an arithmetic number, because the mean of its divisors is an integer number (1078869033217).

Almost surely, 2^{2157738066433} is an apocalyptic number.

It is an amenable number.

2157738066433 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157738066433 is an equidigital number, since it uses as much as digits as its factorization.

2157738066433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15240960, while the sum is 55.

The spelling of 2157738066433 in words is "two trillion, one hundred fifty-seven billion, seven hundred thirty-eight million, sixty-six thousand, four hundred thirty-three".