49999999995857 has 2 divisors, whose sum is σ = 49999999995858. Its totient is φ = 49999999995856.

The previous prime is 49999999995767. The next prime is 49999999995859. The reversal of 49999999995857 is 75859999999994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34736218337536 + 15263781658321 = 5893744^2 + 3906889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49999999995857 is a prime.

Together with 49999999995859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (49999999995859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24999999997928 + 24999999997929.

It is an arithmetic number, because the mean of its divisors is an integer number (24999999997929).

Almost surely, 2^{49999999995857} is an apocalyptic number.

It is an amenable number.

49999999995857 is a deficient number, since it is larger than the sum of its proper divisors (1).

49999999995857 is an equidigital number, since it uses as much as digits as its factorization.

49999999995857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2169554738400, while the sum is 110.

The spelling of 49999999995857 in words is "forty-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-five thousand, eight hundred fifty-seven".