49661571593 has 2 divisors, whose sum is σ = 49661571594. Its totient is φ = 49661571592.

The previous prime is 49661571581. The next prime is 49661571637. The reversal of 49661571593 is 39517516694.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27540066304 + 22121505289 = 165952^2 + 148733^2 .

It is a cyclic number.

It is not a de Polignac number, because 49661571593 - 2¹⁶ = 49661506057 is a prime.

It is not a weakly prime, because it can be changed into another prime (49661571523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24830785796 + 24830785797.

It is an arithmetic number, because the mean of its divisors is an integer number (24830785797).

Almost surely, 2^49661571593 is an apocalyptic number.

It is an amenable number.

49661571593 is a deficient number, since it is larger than the sum of its proper divisors (1).

49661571593 is an equidigital number, since it uses as much as digits as its factorization.

49661571593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6123600, while the sum is 56.

The spelling of 49661571593 in words is "forty-nine billion, six hundred sixty-one million, five hundred seventy-one thousand, five hundred ninety-three".