49878854309 has 2 divisors, whose sum is σ = 49878854310. Its totient is φ = 49878854308.

The previous prime is 49878854299. The next prime is 49878854317. The reversal of 49878854309 is 90345887894.

It is a happy number.

49878854309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39356608225 + 10522246084 = 198385^2 + 102578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49878854309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49878857309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24939427154 + 24939427155.

It is an arithmetic number, because the mean of its divisors is an integer number (24939427155).

Almost surely, 2^49878854309 is an apocalyptic number.

It is an amenable number.

49878854309 is a deficient number, since it is larger than the sum of its proper divisors (1).

49878854309 is an equidigital number, since it uses as much as digits as its factorization.

49878854309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69672960, while the sum is 65.

The spelling of 49878854309 in words is "forty-nine billion, eight hundred seventy-eight million, eight hundred fifty-four thousand, three hundred nine".