2857019433949 has 2 divisors, whose sum is σ = 2857019433950. Its totient is φ = 2857019433948.

The previous prime is 2857019433923. The next prime is 2857019434001. The reversal of 2857019433949 is 9493349107582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2150548925625 + 706470508324 = 1466475^2 + 840518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2857019433949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2857019433049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1428509716974 + 1428509716975.

It is an arithmetic number, because the mean of its divisors is an integer number (1428509716975).

Almost surely, 2^{2857019433949} is an apocalyptic number.

It is an amenable number.

2857019433949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2857019433949 is an equidigital number, since it uses as much as digits as its factorization.

2857019433949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58786560, while the sum is 64.

The spelling of 2857019433949 in words is "two trillion, eight hundred fifty-seven billion, nineteen million, four hundred thirty-three thousand, nine hundred forty-nine".