49806187129 has 2 divisors, whose sum is σ = 49806187130. Its totient is φ = 49806187128.

The previous prime is 49806187097. The next prime is 49806187163. The reversal of 49806187129 is 92178160894.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41360577129 + 8445610000 = 203373^2 + 91900^2 .

It is a cyclic number.

It is not a de Polignac number, because 49806187129 - 2⁵ = 49806187097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 49806187129.

It is not a weakly prime, because it can be changed into another prime (49806181129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24903093564 + 24903093565.

It is an arithmetic number, because the mean of its divisors is an integer number (24903093565).

Almost surely, 2^49806187129 is an apocalyptic number.

It is an amenable number.

49806187129 is a deficient number, since it is larger than the sum of its proper divisors (1).

49806187129 is an equidigital number, since it uses as much as digits as its factorization.

49806187129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 49806187129 in words is "forty-nine billion, eight hundred six million, one hundred eighty-seven thousand, one hundred twenty-nine".