6938153951857 has 2 divisors, whose sum is σ = 6938153951858. Its totient is φ = 6938153951856.

The previous prime is 6938153951803. The next prime is 6938153951909. The reversal of 6938153951857 is 7581593518396.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6668381747041 + 269772204816 = 2582321^2 + 519396^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6938153951857 is a prime.

It is not a weakly prime, because it can be changed into another prime (6938153951957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3469076975928 + 3469076975929.

It is an arithmetic number, because the mean of its divisors is an integer number (3469076975929).

Almost surely, 2^{6938153951857} is an apocalyptic number.

It is an amenable number.

6938153951857 is a deficient number, since it is larger than the sum of its proper divisors (1).

6938153951857 is an equidigital number, since it uses as much as digits as its factorization.

6938153951857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944000, while the sum is 70.

The spelling of 6938153951857 in words is "six trillion, nine hundred thirty-eight billion, one hundred fifty-three million, nine hundred fifty-one thousand, eight hundred fifty-seven".