1857628097849 has 2 divisors, whose sum is σ = 1857628097850. Its totient is φ = 1857628097848.

The previous prime is 1857628097827. The next prime is 1857628097861. The reversal of 1857628097849 is 9487908267581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1662655513600 + 194972584249 = 1289440^2 + 441557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1857628097849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1857628097879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 928814048924 + 928814048925.

It is an arithmetic number, because the mean of its divisors is an integer number (928814048925).

Almost surely, 2^{1857628097849} is an apocalyptic number.

It is an amenable number.

1857628097849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1857628097849 is an equidigital number, since it uses as much as digits as its factorization.

1857628097849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 487710720, while the sum is 74.

The spelling of 1857628097849 in words is "one trillion, eight hundred fifty-seven billion, six hundred twenty-eight million, ninety-seven thousand, eight hundred forty-nine".