354443558681 has 2 divisors, whose sum is σ = 354443558682. Its totient is φ = 354443558680.

The previous prime is 354443558671. The next prime is 354443558699. The reversal of 354443558681 is 186855344453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 341283798025 + 13159760656 = 584195^2 + 114716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-354443558681 is a prime.

It is a super-2 number, since 2×354443558681² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (354443558671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177221779340 + 177221779341.

It is an arithmetic number, because the mean of its divisors is an integer number (177221779341).

Almost surely, 2^354443558681 is an apocalyptic number.

It is an amenable number.

354443558681 is a deficient number, since it is larger than the sum of its proper divisors (1).

354443558681 is an equidigital number, since it uses as much as digits as its factorization.

354443558681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648000, while the sum is 56.

The spelling of 354443558681 in words is "three hundred fifty-four billion, four hundred forty-three million, five hundred fifty-eight thousand, six hundred eighty-one".