49661591593 has 2 divisors, whose sum is σ = 49661591594. Its totient is φ = 49661591592.

The previous prime is 49661591531. The next prime is 49661591611. The reversal of 49661591593 is 39519516694.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49260470809 + 401120784 = 221947^2 + 20028^2 .

It is a cyclic number.

It is not a de Polignac number, because 49661591593 - 2³³ = 41071657001 is a prime.

It is not a weakly prime, because it can be changed into another prime (49661571593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24830795796 + 24830795797.

It is an arithmetic number, because the mean of its divisors is an integer number (24830795797).

Almost surely, 2^49661591593 is an apocalyptic number.

It is an amenable number.

49661591593 is a deficient number, since it is larger than the sum of its proper divisors (1).

49661591593 is an equidigital number, since it uses as much as digits as its factorization.

49661591593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7873200, while the sum is 58.

The spelling of 49661591593 in words is "forty-nine billion, six hundred sixty-one million, five hundred ninety-one thousand, five hundred ninety-three".