49397611789 has 2 divisors, whose sum is σ = 49397611790. Its totient is φ = 49397611788.

The previous prime is 49397611787. The next prime is 49397611829. The reversal of 49397611789 is 98711679394.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24732909289 + 24664702500 = 157267^2 + 157050^2 .

It is a cyclic number.

It is not a de Polignac number, because 49397611789 - 2¹ = 49397611787 is a prime.

Together with 49397611787, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 49397611789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49397611787) 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, 24698805894 + 24698805895.

It is an arithmetic number, because the mean of its divisors is an integer number (24698805895).

Almost surely, 2^49397611789 is an apocalyptic number.

It is an amenable number.

49397611789 is a deficient number, since it is larger than the sum of its proper divisors (1).

49397611789 is an equidigital number, since it uses as much as digits as its factorization.

49397611789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20575296, while the sum is 64.

The spelling of 49397611789 in words is "forty-nine billion, three hundred ninety-seven million, six hundred eleven thousand, seven hundred eighty-nine".