49878214817 has 2 divisors, whose sum is σ = 49878214818. Its totient is φ = 49878214816.

The previous prime is 49878214787. The next prime is 49878214831. The reversal of 49878214817 is 71841287894.

It is a happy number.

49878214817 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., 48844978081 + 1033236736 = 221009^2 + 32144^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49878214817 is a prime.

It is not a weakly prime, because it can be changed into another prime (49878214877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24939107408 + 24939107409.

It is an arithmetic number, because the mean of its divisors is an integer number (24939107409).

Almost surely, 2^49878214817 is an apocalyptic number.

It is an amenable number.

49878214817 is a deficient number, since it is larger than the sum of its proper divisors (1).

49878214817 is an equidigital number, since it uses as much as digits as its factorization.

49878214817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7225344, while the sum is 59.

The spelling of 49878214817 in words is "forty-nine billion, eight hundred seventy-eight million, two hundred fourteen thousand, eight hundred seventeen".