49878214891 has 2 divisors, whose sum is σ = 49878214892. Its totient is φ = 49878214890.

The previous prime is 49878214879. The next prime is 49878214921. The reversal of 49878214891 is 19841287894.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49878214891 - 2²³ = 49869826283 is a prime.

It is not a weakly prime, because it can be changed into another prime (49878214831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24939107445 + 24939107446.

It is an arithmetic number, because the mean of its divisors is an integer number (24939107446).

Almost surely, 2^49878214891 is an apocalyptic number.

49878214891 is a deficient number, since it is larger than the sum of its proper divisors (1).

49878214891 is an equidigital number, since it uses as much as digits as its factorization.

49878214891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9289728, while the sum is 61.

The spelling of 49878214891 in words is "forty-nine billion, eight hundred seventy-eight million, two hundred fourteen thousand, eight hundred ninety-one".