396558593381 has 2 divisors, whose sum is σ = 396558593382. Its totient is φ = 396558593380.

The previous prime is 396558593363. The next prime is 396558593429. The reversal of 396558593381 is 183395855693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247381890625 + 149176702756 = 497375^2 + 386234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396558593381 is a prime.

It is a super-2 number, since 2×396558593381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396558596381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198279296690 + 198279296691.

It is an arithmetic number, because the mean of its divisors is an integer number (198279296691).

Almost surely, 2^396558593381 is an apocalyptic number.

It is an amenable number.

396558593381 is a deficient number, since it is larger than the sum of its proper divisors (1).

396558593381 is an equidigital number, since it uses as much as digits as its factorization.

396558593381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976000, while the sum is 65.

The spelling of 396558593381 in words is "three hundred ninety-six billion, five hundred fifty-eight million, five hundred ninety-three thousand, three hundred eighty-one".