354838709681 has 2 divisors, whose sum is σ = 354838709682. Its totient is φ = 354838709680.

The previous prime is 354838709677. The next prime is 354838709699. The reversal of 354838709681 is 186907838453.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201945979456 + 152892730225 = 449384^2 + 391015^2 .

It is a cyclic number.

It is not a de Polignac number, because 354838709681 - 2² = 354838709677 is a prime.

It is a super-2 number, since 2×354838709681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (354838709081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 177419354840 + 177419354841.

It is an arithmetic number, because the mean of its divisors is an integer number (177419354841).

Almost surely, 2^354838709681 is an apocalyptic number.

It is an amenable number.

354838709681 is a deficient number, since it is larger than the sum of its proper divisors (1).

354838709681 is an equidigital number, since it uses as much as digits as its factorization.

354838709681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34836480, while the sum is 62.

The spelling of 354838709681 in words is "three hundred fifty-four billion, eight hundred thirty-eight million, seven hundred nine thousand, six hundred eighty-one".