49875857917 has 2 divisors, whose sum is σ = 49875857918. Its totient is φ = 49875857916.

The previous prime is 49875857893. The next prime is 49875857929. The reversal of 49875857917 is 71975857894.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40036408281 + 9839449636 = 200091^2 + 99194^2 .

It is a cyclic number.

It is not a de Polignac number, because 49875857917 - 2⁷ = 49875857789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49875858917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24937928958 + 24937928959.

It is an arithmetic number, because the mean of its divisors is an integer number (24937928959).

Almost surely, 2^49875857917 is an apocalyptic number.

It is an amenable number.

49875857917 is a deficient number, since it is larger than the sum of its proper divisors (1).

49875857917 is an equidigital number, since it uses as much as digits as its factorization.

49875857917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 177811200, while the sum is 70.

The spelling of 49875857917 in words is "forty-nine billion, eight hundred seventy-five million, eight hundred fifty-seven thousand, nine hundred seventeen".