4156765243549 has 2 divisors, whose sum is σ = 4156765243550. Its totient is φ = 4156765243548.

The previous prime is 4156765243489. The next prime is 4156765243567. The reversal of 4156765243549 is 9453425676514.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3441607494649 + 715157748900 = 1855157^2 + 845670^2 .

It is a cyclic number.

It is not a de Polignac number, because 4156765243549 - 2¹⁵ = 4156765210781 is a prime.

It is a super-2 number, since 2×4156765243549² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4156765241549) 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, 2078382621774 + 2078382621775.

It is an arithmetic number, because the mean of its divisors is an integer number (2078382621775).

Almost surely, 2^{4156765243549} is an apocalyptic number.

It is an amenable number.

4156765243549 is a deficient number, since it is larger than the sum of its proper divisors (1).

4156765243549 is an equidigital number, since it uses as much as digits as its factorization.

4156765243549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864000, while the sum is 61.

The spelling of 4156765243549 in words is "four trillion, one hundred fifty-six billion, seven hundred sixty-five million, two hundred forty-three thousand, five hundred forty-nine".