49664105081 has 2 divisors, whose sum is σ = 49664105082. Its totient is φ = 49664105080.

The previous prime is 49664105069. The next prime is 49664105083. The reversal of 49664105081 is 18050146694.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30780948025 + 18883157056 = 175445^2 + 137416^2 .

It is a cyclic number.

It is not a de Polignac number, because 49664105081 - 2¹⁰ = 49664104057 is a prime.

It is a super-2 number, since 2×49664105081² (a number of 22 digits) contains 22 as substring.

Together with 49664105083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49664105083) 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, 24832052540 + 24832052541.

It is an arithmetic number, because the mean of its divisors is an integer number (24832052541).

Almost surely, 2^49664105081 is an apocalyptic number.

It is an amenable number.

49664105081 is a deficient number, since it is larger than the sum of its proper divisors (1).

49664105081 is an equidigital number, since it uses as much as digits as its factorization.

49664105081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 49664105081 in words is "forty-nine billion, six hundred sixty-four million, one hundred five thousand, eighty-one".