49865079281 has 2 divisors, whose sum is σ = 49865079282. Its totient is φ = 49865079280.

The previous prime is 49865079247. The next prime is 49865079293. The reversal of 49865079281 is 18297056894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49468432225 + 396647056 = 222415^2 + 19916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49865079281 is a prime.

It is a super-2 number, since 2×49865079281² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 49865079281.

It is not a weakly prime, because it can be changed into another prime (49865079241) 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, 24932539640 + 24932539641.

It is an arithmetic number, because the mean of its divisors is an integer number (24932539641).

Almost surely, 2^49865079281 is an apocalyptic number.

It is an amenable number.

49865079281 is a deficient number, since it is larger than the sum of its proper divisors (1).

49865079281 is an equidigital number, since it uses as much as digits as its factorization.

49865079281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 59.

The spelling of 49865079281 in words is "forty-nine billion, eight hundred sixty-five million, seventy-nine thousand, two hundred eighty-one".