2156263441237 has 2 divisors, whose sum is σ = 2156263441238. Its totient is φ = 2156263441236.

The previous prime is 2156263441193. The next prime is 2156263441253. The reversal of 2156263441237 is 7321443626512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1975188511396 + 181074929841 = 1405414^2 + 425529^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156263441237 - 2⁷ = 2156263441109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156263441037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078131720618 + 1078131720619.

It is an arithmetic number, because the mean of its divisors is an integer number (1078131720619).

Almost surely, 2^{2156263441237} is an apocalyptic number.

It is an amenable number.

2156263441237 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156263441237 is an equidigital number, since it uses as much as digits as its factorization.

2156263441237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 46.

The spelling of 2156263441237 in words is "two trillion, one hundred fifty-six billion, two hundred sixty-three million, four hundred forty-one thousand, two hundred thirty-seven".