49556268161 has 2 divisors, whose sum is σ = 49556268162. Its totient is φ = 49556268160.

The previous prime is 49556268121. The next prime is 49556268193. The reversal of 49556268161 is 16186265594.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39181827136 + 10374441025 = 197944^2 + 101855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49556268161 is a prime.

It is not a weakly prime, because it can be changed into another prime (49556268121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24778134080 + 24778134081.

It is an arithmetic number, because the mean of its divisors is an integer number (24778134081).

Almost surely, 2^49556268161 is an apocalyptic number.

It is an amenable number.

49556268161 is a deficient number, since it is larger than the sum of its proper divisors (1).

49556268161 is an equidigital number, since it uses as much as digits as its factorization.

49556268161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3110400, while the sum is 53.

The spelling of 49556268161 in words is "forty-nine billion, five hundred fifty-six million, two hundred sixty-eight thousand, one hundred sixty-one".