49689714821 has 2 divisors, whose sum is σ = 49689714822. Its totient is φ = 49689714820.

The previous prime is 49689714803. The next prime is 49689714827. The reversal of 49689714821 is 12841798694.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49206330625 + 483384196 = 221825^2 + 21986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49689714821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49689714827) 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, 24844857410 + 24844857411.

It is an arithmetic number, because the mean of its divisors is an integer number (24844857411).

Almost surely, 2^49689714821 is an apocalyptic number.

It is an amenable number.

49689714821 is a deficient number, since it is larger than the sum of its proper divisors (1).

49689714821 is an equidigital number, since it uses as much as digits as its factorization.

49689714821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 59.

The spelling of 49689714821 in words is "forty-nine billion, six hundred eighty-nine million, seven hundred fourteen thousand, eight hundred twenty-one".