167857645393 has 2 divisors, whose sum is σ = 167857645394. Its totient is φ = 167857645392.

The previous prime is 167857645349. The next prime is 167857645399. The reversal of 167857645393 is 393546758761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110139024384 + 57718621009 = 331872^2 + 240247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-167857645393 is a prime.

It is not a weakly prime, because it can be changed into another prime (167857645399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83928822696 + 83928822697.

It is an arithmetic number, because the mean of its divisors is an integer number (83928822697).

Almost surely, 2^167857645393 is an apocalyptic number.

It is an amenable number.

167857645393 is a deficient number, since it is larger than the sum of its proper divisors (1).

167857645393 is an equidigital number, since it uses as much as digits as its factorization.

167857645393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 114307200, while the sum is 64.

It can be divided in two parts, 1678576 and 45393, that added together give a square (1723969 = 1313²).

The spelling of 167857645393 in words is "one hundred sixty-seven billion, eight hundred fifty-seven million, six hundred forty-five thousand, three hundred ninety-three".