10191941857 has 2 divisors, whose sum is σ = 10191941858. Its totient is φ = 10191941856.

The previous prime is 10191941831. The next prime is 10191941863. The reversal of 10191941857 is 75814919101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8701904656 + 1490037201 = 93284^2 + 38601^2 .

It is an emirp because it is prime and its reverse (75814919101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10191941857 - 2¹¹ = 10191939809 is a prime.

It is not a weakly prime, because it can be changed into another prime (10191941807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5095970928 + 5095970929.

It is an arithmetic number, because the mean of its divisors is an integer number (5095970929).

Almost surely, 2^10191941857 is an apocalyptic number.

It is an amenable number.

10191941857 is a deficient number, since it is larger than the sum of its proper divisors (1).

10191941857 is an equidigital number, since it uses as much as digits as its factorization.

10191941857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 46.

The spelling of 10191941857 in words is "ten billion, one hundred ninety-one million, nine hundred forty-one thousand, eight hundred fifty-seven".